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Introduction to Chemistry

Labs 3 and 4: Density Lab
Lab 3-Measurements
Pre-lab questions
o Work with significant figures
o Be able to convert from one unit to another
Lab
o Determine density of water using linear measurements
o Determine density of water using liquid measurement
Post-lab questions
o Discuss accuracy and precision
Lab 4-Density
Pre-lab questions
o Discuss possible changes to density of a substance
o Discuss hazards of the lab
o Determine the density of a substance for identification
Lab
o Compare density of substances using a density gradient column
o Determine the density of washers and identify the material
Post-lab questions
o Discuss the washers material
o Discuss the density gradient column
Scoring Guide ? 100 Points Possible
Points
Received
Points
Possible
9 Lab 3- Pre-lab questions
18 Lab 3- Data tables
14 Lab 3- Calculations
9 Lab 3- Post-lab questions.
10 Lab 4- Pre-lab questions
16 Lab 4- Data tables
24 Lab 4- Post-lab questions
Journal: An Introduction to Chemistry
Funding Research
o Basic or Applied
o Support of research whether basic and applied
o Format
How I Collect and Process Data
o Identify data
o Explain how to use the data to form information
o Explain how to combine information to form knowledge
No Two Watches
o Record data
o Analyze data
o Observation
Experience with Safety
o Description of what was going on
o Explanation of why safety is important
o Explanation of precautions
Scoring Guide ? 80 Points Possible
Points
Received
Points
Possible
20 Comments on Research
20 Processing data
20 Comparison of Two watches
20 Explanation of safety
Chemistry All Around
Assignment: Properties
Statue
o Choose 6 physical properties and assign as
? Extensive
? Intensive
o Choose one of the above properties and support why assigned specific type
Wooden Ball
o Choose 6 physical properties and assign as
? Extensive
? Intensive
o Choose one of the above properties and support why assigned specific type
Eraser
o Choose 6 physical properties and assign as
? Extensive
? Intensive
o Choose one of the above properties and support why assigned specific type
Scoring Guide ? 45 Points Possible
Points
Received
Points
Possible
15 Statue
15 Wooden Ball
15 Eraser
Journal: Seltzer in Water
Identify chemical and physical reactions
Use observations to support types of reactions
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
10 Identify reactions
10 Support type of reaction with observations
Lab 6: Chemical and Physical Changes Lab
Pre-lab
o Define chemical and physical properties and give examples
o Explain sublimation
Lab
o Use aspirin to make solutions
o React one solution with sodium bicarbonate
o React the solution with sodium bicarbonate with citric acid
Post-lab questions
o Identify examples as chemical or physical changes
o Discuss the result from the lab
Scoring Guide ? 100 Points Possible
Points
Received
Points
Possible
15 Pre-lab questions
35 Chart
50 Post-lab questions 5 points each
Exploratory Activity: Chromatography
Observe first marker
Observe second marker
Note difference and causes
Theorize reasons for differences
Note if there are similar color components in the two markers
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
5 Observation of first marker
5 Observations of second marker
5 Differences
5 Theories
5 Similar colors
Lab 5: Mixture Separation Lab
Pre-lab
o Discuss homogeneous and heterogeneous mixtures
o Discuss the separation of salt and sand
Lab
o Separate aspirin from solution
o Determine mass of aspirin
o Find percent recovery
o Make observations of separation
Post-lab
o Discuss the characteristics of aspirin used in lab
o Discuss the reason for rinsing the aspirin crystals with cold water
o Explain the percent recovery
Scoring Guide ? 100 Points Possible
Points
Received
Points
Possible
10 Pre-lab questions
21 Data and calculations
15 Chart
54 Post-lab questions
Atomic Structure
Journal: Probability Activity
1- Describe the arrangements of the dots
2- Draw what you observe (you can print this form and draw the picture and scan in the form to
submit, save as pdf)
3- Identify where the most drops concentrate
4- Predict where the next drop will fall and support your prediction
5- Discuss what percent of the drops hit he center of the dime
6- Express the amount of drops within the largest circle but outside the dime region as a percent
7- Predict the percent drops in the dime region compared to outside this region if your eyes were
closed
8- Describe other observations that you found interesting
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
2 1 – Description
2 2 – Drawing
2 3 – Identification
2 4 – Prediction
3 5 – Discussion
3 6 – Expression
3 7 – Prediction
3 8 – Description
WebQuest: Dividing the Indivisible
History of the Subatomic Particles
o Electron
? Description of electron
? Identify the discover of the electron
? Describe how it was discovered
? How the model was changed by this discovery
? Identify Discovery date
o Nucleus
? Description of nucleus
? Identify the discover of the nucleus
? Describe how it was discovered
? How the model was changed by this discovery
? Identify Discovery date
o Proton
? Description of proton
? Identify the discover of the proton
? Describe how it was discovered
? How the model was changed by this discovery
? Identify Discovery date
o Neutron
? Description of neutron
? Identify the discover of the neutron
? Describe how it was discovered
? How the model was changed by this discovery
? Identify Discovery date
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
6 Electron
6 Nucleus
6 Proton
6 Neutron
1 Filling in all answers
Journal: Electron Orbitals (Clouds)
1- Reflect on Probability Activity and describe what the final target look like
2 ?Describe how you think electron orbits look like from the choices below and draw how you think it
would look in the appropriate box. (Save your journal file and print, it then draw the diagram for this
part and scan into your computer and save as pdf)
o The path of a planet around the Sun
o The Clouds in the sky
o A bunch of dots whose density decreases further way from the center of the bunch
3- Reflect on the idea that there are still uncertainties in science
o Express how you feel about this
o Discuss how you handle other uncertainties
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
2 1-Reflection
2 2-Identification of how an electron orbit looks
8 2a-Drawing of your choice
6 3a-Expression of feels
2 3b-How to handle uncertainties
Lab 10 Light Spectrum Lab
Pre-lab
o Explain diffraction grating
o Identify a jewel using color to determine wavelength
o Calculate wavelength given diffraction lines distance and distances from spots appearance
Lab
o Make observations and draw spectrums a CD and flashlight and a CD and laser pointer
o Make observations and draw results of a laser pointer shone through a diffraction grating of
500lines/mm
o Make observations of flashlight shone through diffraction grating of 1000 lines/mm
o Calculate the wavelength of the laser pointer
Post-lab
o Explain the spectra differences between the laser light and the flashlight when shown on the CD
o Discuss the results of the laser pointer and flashlight shown through the diffraction grating
o Explain any errors for the wavelength of the laser pointer light being different than the wavelength
for red light
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
12 Pre-lab questions
16 Observations, data and calculations
4 Chart
18 Post-lab questions
Lab 10 Electron Configuration Lab
Pre-lab
o Discuss electron configuration and light emitted
Lab
o Heat lithium chloride, sodium chloride, potassium chloride, calcium chloride, and charcoal to
determine the color observed
Post-lab
o Write electron configurations for the metal in the salts in the lab
o Using the color determine the wavelength of each metal
o Explain why a salt produces a specific color
o Explain why sodium chloride and activated charcoal produces the same color of light
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
4 Pre-lab questions
10 Lab Data table
36 Post-lab questions
Periodic Table
Journal: Super Heavy Elements
Describe what a heavy element is
Describe what a super heavy elements is compared to a heavy element
Explain how new elements are discovered
Describe some of the properties of artificial element
Discuss what the island of stability and island of instability are
Support why this research is important
Apply how these elements can be use practically
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
6 Description
7 Description
7 Explanation
7 Description
7 Discussion
8 Support
8 Application
WebQuest: Get to Know the Neighborhood
Part 1 The IUPAC Periodic Table
Part 2 Properties of Elements
o Properties of halogens
o Biological roles of selected element
o Interesting information of selected elements
Part 3 Your Own Personal Element
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
7 The IUPAC Periodic Table
30 Properties of elements
13 Personal Element information
WebQuest: Origin of Elements Names
Choose 6 elements and complete the following to show the origin of their names
o Element name and symbol
o Brief Description of Discovery
o Origin of Name
Scoring Guide ? 35 Points Possible
Points
Received
Points
Possible
12 Element name and symbol (2/element)
12 Brief History (2/element)
11 Origin of Name
Journal: Dot Structure of Atoms and Simple ions
Identify the correct symbol for the atom or ion
Arrange the dots correctly around the symbol including charge if applicable
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
10 Correct symbol (2/atom/ion)
10 Correct dot structure arrangement (2/atom/ion)
Project: Ions for Your Health
Beneficial 3 ions
o Name
o Location
o Role
o Ions that interact, if any
o Commonly found
o How enters the body
Toxic 2 ions
o Name
o Found in body
o Why toxic
o Commonly found in nature
o How it gets ends up in the body
o Who to treat negative effects.
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
30 Beneficial element discussion (10/ion)
20 Toxic (10/ion)
Journal: Practical Periodic Trends
Scenario 1 Replacement of Silicon
o New Element
o Why chosen
o Disadvantage
Scenario 2 Replacement of Sodium Hydroxide
o New compound
o Why chosen
o Disadvantage
Scenario 3 Replacement of Neon
o New compound
o Why chosen
o Disadvantage
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
7 Silicon replacement
7 Sodium hydroxide replacement
7 Neon replacement
4 Follow format
Elements Form Compounds
Journal: Tension Activity
Observation as water is added on penny
o Drawing of water on penny
o Liquid 2 on penny
o Liquid 3 on penny
Similarity and differences of various liquids on penny explained
o New compound
o Why chosen
o Disadvantage
Properties of penny
How this property of water allows
o Bugs to walk on water
o Paper clip to stay on top of water
o Water beads on newly waxed car
Examples of liquids that do not have these properties
Other interesting observations
Scoring Guide ? 30 Points Possible
Points
Received
Points
Possible
6 Observations of water on penny
6 Similarities and difference of 3 liquids
5 Penny properties
5 How property allows bugs and paper clip to stay
on top of water and bead on wax
4 Examples of nonwater liquids
4 Other observations
Writing Assignment: Ionic Compounds in Action
4 Ionic compound correctly identifying the follow
o Provide the formula, scientific name, and common name (if applicable)
o Identify the fundamental particles by name and formula
o Describe how and where the compound is used
o Identify at least two properties of the compound that make it well-suited for its use
o Explain how the properties you list are related to the bonding within the compound
Follow the format of the assignment for one of the following
o Written Report
o Tri-fold brochure
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
8 Formula, scientific and common name
8 Fundamental particles
8 How and when used
8 Two properties for usefulness
8 Properties relate to bonding
10 Follow the assigned format
Lab 12 Ionic and Covalent Bonds Lab
Pre-lab
o Define ionic and covalent bonds
o Discuss the conductivity of sugar and salt and their type of bond
Lab
o Observe the results on a screw in a solution of salt water and sugar water when an electrical current
is passed through the screw
o Observe the results of heating salt and sugar
Post-lab
o Explain why distilled water is used
o Explain the results of the sugar solution in an electrical current
o Explain the results of the salt solution in an electrical current
o Explain the differences seen in the heating of salt and sugar
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
12 Pre-lab questions
16 Lab data tables
22 Post-lab questions
Lab 11 Molecular Models Lab
Pre-lab
o Identify the central atom and number of regions of electron density in BeCl2, BH3, and CBr4.
Lab
o Using magnets observe the repulsion and attraction and determine the how close they can be
brought together
o Identify the shape and bond angle of different bond shape
Post-lab
o Explain how the molecular shape description fit the geometry in the introduction
o Predict the shape and bond angles of BeCl2 , BH3, CBr4
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
8 Pre-lab questions
31 Lab Data charts
11 Post-lab questions
Lab 13 Polar Bonding Lab
Pre-lab
o Discuss the differences between polar bonds and non-polar bonds
o Explain the characteristics of a polar bond
o Give examples of polar and non-polar bonds
o Give the ?general? rule for the use of polar and non-polar solvents
Lab
o Observe the ink picked up by ?slime? and ?Silly Putty?
o Use chromatography to observe the movement of the inks on filter paper.
Post-lab
o Explain whether ?slime? is polar or non-polar
o Explain whether ?Silly Putty? is polar or non-polar
o Explain the classification of the inks used
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
5 Pre-lab questions
33 Lab data tables and questions
12 Post-lab questions
Chemical Reactions and the Mole
Lab 17 Avogadro?s Number Lab
Pre-lab
o Determine grams/mole of water
o Determine molecules/mole of water
o Determine mole in 1 gram of water
o Determine molecules in 1 gram of water
Lab
o Prepare a solution of dishwashing soap
o Calibrate the dropper in 2 mL
o Determine drops/mL
o Place cinnamon in a petri dish
o Drop a single drop of dishwashing solution to form a clear circle
o Measure the circle in cm
o Calculate the surface area formed
o Using the equation provided find the number of molecules for the top layer
o Calculate the concentration (grams/mL) of sodium stearate
o Calculate the moles of sodium stearate using the equation provided
o Calculate Avogadro?s number of sodium stearate
Post-lab
o Explain the causes for a different answer for Avogadro?s number in the lab than the
6.023 X 1023molecules/mole
o Determine moles of CH4 given 0.298 g
o Determine moles in 1 X 109 molecules of H2O2
o Determine mass in grams of H2O2 in 1 X 109 molecules
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
8 Pre-lab questions
4 Lab Data charts
15 Lab Calculations
23 Post-lab questions
Lab 14 Chemical Reactions I Lab
Pre-lab
o Identify the chemical that makes up teeth
o Explain how plaque hurts teeth
o Explain what fluoride does for dental health
o Give 2 solubility rules for this lab
Lab
o Observe the reaction of two rinses with Ca(C2H3O2)2
Post-lab
o Discuss whether the mouth rinses have fluoride
o Explain which mouth rinses will fight cavities and why
o Discuss is potassium nitrate could be used to test for fluoride in mouth rinses
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
20 Pre-lab questions
12 Lab Data
18 Post-lab questions
Lab 15 Chemical Reactions II Lab
Pre-lab
o Identify the type of reaction for 6 different reactions
o Balance 5 reactions
Lab
o Do 5 reactions to explain the pre-reaction substances and the post-reaction substances
Post-lab
o Write the balanced chemical reaction for using propane (C3H8)
o Balance and identify 4 reactions
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
22 Pre-lab questions
10 Lab Chart
18 Post-lab questions
Lab 19 Stoichiometry Lab
Pre-lab
o Define a limiting reagent
o Find the percent yield for a reaction between CaCl2 and K2CO3
Lab
o Do 3 trials of a reaction between CaCl2 and K2CO3
o Find the original and final masses of each substance
o Determine the limiting reagent for each trial
o Find the theoretical yields of each trial
o Find the percent yield of each trial
o Compare the theoretical and actual yields for each trial
Post-lab
o Compare the results of each trial using the grams of CaCO3
o Discuss the results of each trial.
o Predict what would happen if 6.0 grams of CaCl2 were used with no change in K2CO3
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
5 Pre-lab questions
25 Lab Data charts
15 Calculations
5 Post-lab questions
Solid Liquid and Gases
Assignment: Keeping an Eye on Particles
Observe the two containers of water (one hot the other cold) as food dye is added
? Observe at moment add food dye
? Observe five minutes after adding food dye
o Describe behavior of food coloring in each glass
o Compare and contrast the similarities and differences
o Explain the differences in behavior
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
7 Description of behavior
6 Compare and contrast
7 Explain behavior
WebQuest: Solids, Liquids and Gases
Part I: Observation of Oxygen in Virtual Container
o Relate your observations to the kinetic molecular theory
o Identify three types of motion seen by the gas molecules
o Describe what is happening in the 3 different phases for 6 different conditions of the gas
Part II: Two substance at the same temperature but in different phases
o Identify the temperature in the correct units
o Compare Argon behavior and water behavior at the same temperature
o Relate the difference in behavior to the different types of intermolecular attraction of Ar and H2O.
Part III: How does adding or removing heat change the particles motion of a substance?
o Describe the observed motion of the particles at three assigned temperature
o Identify the statement that best describes the change in particle motion that occurs when heat is
gradually removed from a substance.
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
15 Part I
5 Part II
5 Part III
Assignment: Gas Law in Action
The presentation includes the following parts
o Description of the changes that occur in each step of the process in terms of the pressure,
volume, temperature, and moles of gas present
o Identify which variables are constant, and which are changing
o Identification of the gas law or gas laws that apply to the process
o Creation and solution to a sample calculation using realistic values of pressure, temperature,
amount of gas, and volume
Organization is in correct form
Understanding of the process is correct and clearly expressed
The assignment is in tri fold pamphlet or slide presentation
The presentation has correct mechanics in its format
Scoring Guide ? 100 Points Possible
Points
Received
Points
Possible
12 Description of changes
13 Identification of constants and variables
12 Identification of appropriate gas law
13 Correct set up and solution to a gas law problem
10 Organization
20 Understanding
10 Presentation format
10 Mechanics
Lab 20 Ideal Gas Law Lab
Pre-lab
o Discuss what is in yeast that aids in decomposition of H2O2
o Define the symbols used for the ideal gas law
o Find moles of O2 in the decomposition of H2O2 when given the temperature, pressure, and
volume
o Find the theoretical yield of O2 when H2O2 decomposes
Lab
o Find volume of O2 in a reaction between H2O2 and carrot juice
o Measure the time it takes the reaction to occur
o Determine the Kelvin temperature once Celsius is known
o Determine the barometric pressure in atmospheres
o Convert the volume from mL to L
o Rearrange the ideal gas law to find moles (n)
o Find moles of O2 found in the experiment
o Find the theoretical yield of O2 when decomposing H2O2
o Find the percent of H2O2
o Determine the reaction rate of the experiment
Post-lab
o Discuss the difference in percent of H2O2 found and the actual 3%
o Discuss what would happen if the amount of catalyst would affect the decomposition of H2O2
Scoring Guide ? 75 Points Possible
Points
Received
Points
Possible
12 Pre-lab questions
24 Lab Data charts
32 Calculations
7 Post-lab questions
Journal: Optical Glass
Answer the discussion questions
o Define ?glass?
o Explain how optical glass is different from other kinds of glass
o Explain why rapid cooling is needed to form glass
o Explain why lenses are made from amorphous solids
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
5 What is glass
5 Differences in glass
5 Explanation of reason
5 Why amorphous solid
Drawing Assignment: Picture Perfect Particles
Draw two of the three given conditions on a molecular level identifying the solid, liquid and vapor phases.
o A rolling boil
? Include the picture with labels for what is happening on the molecular level
? Give a brief explanation of what is happening in your own words
o Ice and water
? Include the picture with labels for what is happening on the molecular level
? Give a brief explanation of what is happening in your own words
o Sublimation
? Include the picture with labels for what is happening on the molecular level
? Give a brief explanation of what is happening in your own words
Scoring Guide ? 30 Points Possible
Points
Received
Points
Possible
15 First Choice
15 Second Choice
Water and Solution Chemistry
Exploration: Take it to the Limit.
Part I Solubility of Strontium Phosphate
o Identify the correct formula for Strontium Phosphate
? Discussion why the cation and anions have an have an unequal ratio
? Explain why not all solution particles are shown in the simulation
? Determine whether or not the solution is saturated and support your answer.
o Discuss what is occurring when more salt is added to the solution
? Bring up to around 60 total strontium ion and describe on a macro level
? Bring up to 100 to 150 total strontium ions and explain what is happening
Part II Copper Iodide solution
o Determine the number of copper ions needed to reach saturation for copper
o Compare the solubility of copper iodide with strontium phosphate
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
16 Part I
4 Part II
Lab 23 Acids and Bases Lab
Pre-lab
o Define a neutralization reaction
o Give the pH of hydrochloric acid
o Give the pH of sodium hydroxide
Lab
o Using purple grape juice as the indicator for two reactions
o Test 7 household products to determine their pH using litmus paper and pH paper
Post-lab
o Discuss the changes in the color of grape juice with the addition of acid and base
o Explain the return to original color of the grape juice after the addition of sodium bicarbonate
and citric acid
o Name two acids and two bases used often everyday
Scoring Guide ? 75 Points Possible
Points
Received
Points
Possible
12 Pre-lab questions
26 Lab Data charts
25 Comparisons of hypothesized pH and actual pH
12 Post-lab questions
Lab 24 Titration Lab
Pre-lab
o Explain the difference between equivalence point and end-point
o Explain what happens in a reaction between an acid and base when no indicator is added
o Determine the end-point of a reaction between ?Smarties? and Na2CO3
Lab
o Do two trials of titration using purple grape juice as the indicator
o Do two trials of titration with ?SweeTarts? and two trials using ?Smarties?
o Determine the amount of Na2CO3 needed in each trial
o Determine the volume of the Na2CO3needed to titrate only the candy
o Write a balanced equation for the reaction with SweeTarts
o Find moles of candy used
o Find the moles per gram of acid found in the candy
o Determine the moles per gram for each of the candy trials
Post-lab
o Determine which candy required more base per gram
o Determine which candy had more acid per gram
o Explain what would happen if air was left in the burette
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
3 Pre-lab questions
28 Lab Data charts
16 Calculations
3 Post-lab questions
Lab16 Metals and Oxidation Lab
Pre-lab
o Give the oxidation state of each element in the reaction:
o Give the element oxidized and the element reduced in the equation above
o Give the order of reactivity for Ni, Au, Fe, Ca, Zn, Al
Lab
o Observe the reaction of Zn and the reaction of Fe in solution with a solution
o Determine which metal reacted more violently by observing the bubbles produced
Post-lab
o Determine the gas produced in the experiment
o Determine the order of reactivity between Fe and Zn
o Determine if the reaction would occur and why
o Explain how acid rain would affect iron rusting
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
21 Pre-lab questions
10 Lab data tables and questions
19 Post-lab questions
Chemical Thermodynamics and Equilibrium
Lab 8 Chemical Processes Lab
Pre-lab
o Define enthalpy
o Explain the relationship between enthalpy and classification as endothermic or exothermic
o Identify the reaction of CaCl2 and water as endothermic or exothermic
Lab
o React a cold pack and measure the change in temperature every 30 seconds up to 30
seconds
o React a hand warmer and measure the change in temperature every 30 seconds for 300
seconds
o Graph the results of the reactions (temperature on the – axis and time on the -axis)
o Calculate the final change in temperature for each reaction
Post-lab
o Identify which pack is endothermic and which is exothermic
o Determine which reaction had the greater change in enthalpy
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
3 Pre-lab questions
29 Lab data tables and graphs
6 Calculations
12 Post-lab questions
Lab 7 Heat and Calorimetry Lab
Pre-lab
o Define food calorie
o Determine the calories in a gram of a cookie
Lab
o Burn Cheetos, marshmallow, and 2 other food samples measuring the temperature of the
water
o Determine the mass of water using density and volume
o Determine the calories of each food sample
Post-lab
o Compare each sample with the amount of calories on the label
o Explain the primary source of error for the experiment
o Explain the reason for burning the food
o Explain changes to the lab that would allow for more accuracy
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
2 Pre-lab questions
24 Lab data tables
12 Calculations
12 Post-lab questions
Lab 21 Reaction Rate Lab
Pre-lab
o Name 5 things that can affect the rate of reaction
o Explain why it is easier to sweeten hot tea than cold tea with ice
o Explain what is the primary factor than determines the increase or decrease of reaction rate
Lab
o Using different solutions of CaCO3 determine the length of time it takes to react
o Calculate the grams/second that reacted for each solution
Post-lab
o Explain the variations made in the experiment
o Explain the biggest factor to influence the reaction
o Explain which reaction was the slowest
o Explain why marble statues take a long time to degrade in acid rain
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
6 Pre-lab questions
20 Lab data tables
10 Calculations
14 Post-lab questions
Lab 22 Catalysts Lab
Pre-lab
o Define catalyst
o Explain how a reaction is affected when more and more catalyst is added
o Write the balanced equation for the decomposition of hydrogen peroxide
o What gas causes the bubbles
o Explain if the metals in a catalytic converter on a car are homogeneous or heterogeneous
catalysts
Lab
o React hydrogen peroxide with 4 substances
o Make observations using different amounts of yeast solution (1mL, 5mL, and 10mL)
Post-lab
o Classify each catalyst used as homogeneous or heterogeneous
o Explain which catalyst caused the reaction to take place the fastest
o Explain which catalyst was easiest removed and give the type of catalyst
o Explain which amount of yeast solution is best
Scoring Guide ? 75 Points Possible
Points
Received
Points
Possible
20 Pre-lab questions
36 Lab data tables
19 Post-lab questions
Nuclear Chemistry
Assignment: M &M Decay
Chart and Data table
o Record your data in the table that includes
? Cumulative time elapsed
? Number of candies remaining
? Percent of original candies remaining
o Graph of Percent vs. time elapsed
Explanation of results
o Describe why the graph looks the way it does and how it relates to radioactive decay
Eraser
o Identify the correct half-life for this activity.
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
10 Cart and Data
8 Explanation of Results
7 Half-life calculations
Writing Assignment: Background Radiation
Answer the following questions to provide information on background radiation in a newspaper column
o What is background radiation?
o What are the major sources of background radiation?
o How is background radiation measured?
o What are two elements that produce background radiation on earth and what do their decay
equations look like?
o What dangers does background radiation pose to humans?
o Do certain areas of the country have higher levels of background radiation than others? If so,
identify these areas and compare the background radiation levels.
Show your understanding
o Stating concepts clearly showing relationships
o All claims are supported and is logical, accurate and relevant
Organization of assignment
o Newspaper article format
o Engaging article
o Correct format with proper spelling and grammar
Scoring Guide ? 50Points Possible
Points
Received
Points
Possible
25 Question answered
15 Understanding
10 Organization
Assignment: Origin of the Elements
Part I Answer the questions below
o How does a star glow?
o What types of elements are found in stars?
o What is a supernova?
o Why does it take so much heat and pressure to create helium and other elements?
Part II: Write balanced equations for the formation of five elements whose atomic numbers are between
Helium (2) and Iron (26)
Show your understanding
o Stating concepts clearly showing relationships
o All claims are supported and are logical, accurate and relevant
Presented in one for the formats below
o As a web page directed towards Middle School students
o A slideshow for a museum that has an exhibition on the origins of the universe
o A video for a museum that has an exhibition on the origins of the universe.
Correct format with proper spelling and grammar
Scoring Guide ? 50 Points Possible
Points Points
Received Possible
8 Part I Answer all four questions
15 Part II Balanced equations
15 Show a good understanding with proper support
7 Clearly presented for target audience
5 Format
WebQuest: Fission or Fizzle
Part I: One Nucleus,
o After hitting the U-235 with a neutron
? Describe what happens
? How the nucleus changes
? Products of the reaction
o How does the energy change after the two daughter nuclei are formed
Part II Change Reaction
o Describe how the results 100 U-235 nuclei differ from one nucleus
? By amount of energy
? Type of reaction (chain reaction or not)
o Describe your observation of reaction step by step including
? Products of each nuclei hit
? Number of neutrons needed for an individual reaction
? Do all neutrons hit nuclei?
o Observe what happens with 100 U-238 nuclei
? Describe the products
? Compare U-238 with U-235
? How are they different in relations to stability?
o Observation of mixture of two isotopes
? Complete data table with ratios of isotopes and their completion of reaction.
? What is the trend with increasing U-238 present in the isotope mix?
? What ratio would you suggest for the most efficient ratio for a nuclear reactor?
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
5 Part I
20 Part II
Journal: Prove It!
Describe: Conservation of Mass
What steps would you use to prove conservation of mass
How does the reaction support conservation of mass?
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
6 Description
7 Steps
7 Proof of conservation
Practice: Conservation of Mass-Energy
Problem 1
o Energy equivalents in Joules.
Problem 2
o Mass per square meter
Problem 3
o Total change in mass in kg
Problem 4
o What is the mass defect in amu
o Mass defect in kg
o Energy equivalent in kilojoules
Problem 5
o Equivalent mass from energy released
Scoring Guide ? 25 Points Possible
Points
Received
Points
Possible
4 Problem 1
4 Problem 2
4 Problem 3
9 Problem 4
4 Problem 5
Journal: Radon Under the Radar
Explain: How Radon is formed
Describe: Location on Earth
Discuss: Why radon is a health concern
Compare: Radon exposure to smoking as a cause in lung cancer
Scoring Guide ? 20 Points Possible
Points
Received
Points
Possible
5 Explanation
5 Description
5 Discussion
5 Comparison
Writing Assignment: Position Essay on Nuclear Power
Support your position by using the following reasons
o Safety
o Energy Efficiency
o Cost
Show your understanding
o Stating concepts clearly showing relationships
o All claims are supported and are logical, accurate and relevant
Presented as a letter to the editor
o The essay is engaging and has carefully chosen examples with correct word choices
o Clearly identify the topic you are addressing
o Concludes with a concise summary statement
Correct format with proper spelling and grammar
Scoring Guide ? 50 Points Possible
Points
Received
Points
Possible
20 Including all three issues
15 Show a good understanding with proper support
10 Clearly written for the general public
5 Form