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carbonate solution. Wait until the bubbling subsides before adding more acetic acid. When all the acetic acid has beenadded, stir for two minutes before moving on to step 6.7.) When the solution is calm again (there may be a few bubbles rising from the bottom of the flask – this is normal),move the flask to a hot plate and heat it to boiling. Be careful that the flask does not boil over because this will causeerrors in your calculations. Put the flask in the hood.8.) When all of the liquid in the solution has boiled away, remove the flask from the hot plate. The power that youobserve inside is the product of the reaction, sodium acetate. Once the flask has had a few minutes to cool down toroom temperature, measure and record its weight.Weight of the flask, after the reaction: _______________9.) When done, rinse out the flask and any other glassware you used. All waste can go down the sink.Data and ObservationsBefore the chemical reaction1. The chemical equation of the reaction between baking soda and vinegar isNaHCO 3 (aq) + CH 3 COOH (aq) ----> CO 2 (g) + H 2 O (l) + CH 3 COONa (aq)Show your calculations for how you found out how many grams of baking soda to use in this lab.Show your calculations for how you found out how many grams of sodium acetate to expect in this lab.Show your calculations for how you found out how many liters of CO 2 to expect from this lab.2. Write down 3 physical properties of baking soda.3. Write down 3 physical properties of vinegar.54
4. What was the mass of the empty 500 mL flask? _________________After the Chemical Reaction5. Write down 3 observations about the chemical reaction after you mixed the baking soda and vinegar.6. What was the weight of the 500-mL flask after the reaction? ______________7. How many grams of sodium acetate were produced? Show your calculations for how you got your answer.8. Using the weight of sodium acetate that you got and the weight of sodium acetate that you were supposed to get,calculate the percent yield for this experiment. Show your calculations below.Results and Discussion1. Why do scientists use stoichiometry? How did it help us in this lab? What did we figure out from using it?2. Did a chemical reaction take place? How do you know? What evidence tells you whether a chemical reactionhappened or not?3. Was your percent yield for sodium acetate 100%? Why or why not?4. Do you think it is common for scientists to get a 100% percent yields for chemical reactions? Why or why not?55
Page 3 and 4: Chemical Changes on a Molecular Lev
Page 7 and 8: Mostly Cloudy Mini-Lab1.) Put on go
Page 9 and 10: STEP 3: EVIDENCE FOR CHEMICAL REACT
Page 11 and 12: *****AS PART OF YOUR HOMEWORK, PLEA
Page 13 and 14: 15.) The diagram below represents a
Page 15 and 16: Structure of an EquationAll chemica
Page 17 and 18: 4.) Fill out the following table ba
Page 19 and 20: Balancing Chemical EquationsBecause
Page 21 and 22: HomeworkFor each problem, balance t
Page 23 and 24: STEP 6: DIMENSIONAL ANALYSIS PART 1
Page 25 and 26: EX #4: How many seconds are in a ye
Page 27 and 28: 1.) How many nickels are in 10 dime
Page 29 and 30: STEP 7: DIMENSIONAL ANALYSIS PART 2
Page 31 and 32: STEP 8: MOLES & PARTICLESReview: Ba
Page 34 and 35: STEP 9: MOLES & GRAMSReview:1.) How
Page 36: HOMEWORKMolar MassDo the following
Page 39 and 40: 3.) At STP, what volume does 0.355
Page 41 and 42: Mole-Volume Conversions1. Determine
Page 43 and 44: 5. How many particles are there in
Page 45 and 46: Example #1: Now, try with a real ch
Page 47 and 48: STEP 13: STOICHIOMETRY PART 21.) Ba
Page 49 and 50: 7. The Haber reaction produces ammo
Page 51 and 52: Name: Date: Period:Stoichiometry is
Page 53: Using stoichiometry, how many moles
Page 57: Name: Date: Period:An essential par

1 Name: Date: Period: Project Description: In this project, you will be ...

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