1. Chem 106: Class/ Lab Week 10 Sign in: Roster @ front of lab
Pick up returned papers
Put names on Molar Masses II if you did not have names on form and resubmit
Pick up handouts (2)
For today’s experiment
Work with the lab partner(s) who set up fermentation with you

2. Chem 106: Class/ Lab Week 10 Turn in Today
Chemical Reactions (Course/ Lab Manual pp )
Reactions, Balancing, Stoichiometry Worksheet (Course/ Lab Manual pp )
Stoichiometry / Limiting Reactant / Ideal Gas Law
(Completed Handout)
Have stamped before leaving lab: Distillation (Course/ Lab Manual pg. 46)

3. Chem 106: Class/ Lab Week 10: Week 11 is Spring Break
Due Week #12
Completed Fermentation Report form (Course/ Lab Manual pg. 46)
Fermentation Post Lab Ques. [Handout: Individually done]

4. Hydrochloric acid + sodium hydrogen carbonate
1 HCl(aq) NaHCO3 (s) _ ___ + _ ___ + _ ___
White = hydrogen
Red = oxygen
Gray = carbon
Green = chlorine
Purple = sodium
Write a complete balanced chemical equation for the reaction by adding products and stoichiometric coefficients from the above reactants.

5. Hydrochloric acid + sodium hydrogen carbonate
1 HCl(aq) NaHCO3 (s) CO2(g) + 1 H2O(l) + 1 NaCl(aq)
White = hydrogen
Red = oxygen
Gray = carbon
Green = chlorine
Purple = sodium
Write a complete balanced chemical equation for the reaction by adding products and stoichiometric coefficients from the above reactants.

6. Hydrochloric acid + sodium hydrogen carbonate 2 HCl(aq) + 2 NaHCO3 (s)
--
Draw a balanced molecular representation for all of the products of the reaction using the following key. (One water molecule is shown.)
Carbon 
Hydrogen 
Oxygen 
Chlorine
Sodium ✪
White = hydrogen
Red = oxygen
Gray = carbon
Green = chlorine
Purple = sodium

7. Hydrochloric acid + sodium hydrogen carbonate 1 HCl(aq) + 1 NaHCO3 (s)
In the previous case, all of the reactant molecules react to produce products and none remain. In this case some reactant remains. Draw the molecule that remains above.
Carbon 
Hydrogen 
Oxygen 
Chlorine
Sodium ✪
White = hydrogen
Red = oxygen
Gray = carbon
Green = chlorine
Purple = sodium

8. Hydrochloric acid + sodium hydrogen carbonate 2 HCl(aq) + 2 NaHCO3 (s)
In the first case, all of the reactant molecules react to produce products and none remain. In this case some reactant remains. Draw the molecule that remains above.
Carbon 
Hydrogen 
Oxygen 
Chlorine
Sodium ✪
White = hydrogen
Red = oxygen
Gray = carbon
Green = chlorine
Purple = sodium

9. Follow the Demo and complete the Handout
Hydrochloric acid + sodium hydrogen carbonate
__ HCl(aq) + _ NaHCO3 (s) _ ___ + _ ___ + _ ___
Follow the Demo and complete the Handout

10. Examine the image above and select the correct statement below.
HCl(aq) + NaHCO3 (s)
Trial 2: The same volume of unknown concentration of HCl was added to each of the flasks using the same amounts of NaHCO3 as used in Trial 1: 2 g, 4 g, 6 g
Examine the image above and select the correct statement below.
NaHCO3 is the limiting reagent in the yellow and blue.
HCl is definitely not the limiting reagent in all three cases.
Equal numbers of moles of HCl and NaHCO3 may have reacted in green.
NaHCO3 is definitely the limiting reagent in all three cases.

11. Examine the image above and select the correct statement below.
HCl(aq) + NaHCO3 (s)
Trial 2: The same volume of unknown concentration of HCl was added to each of the flasks using the same amounts of NaHCO3 as used in Trial 1: 2 g, 4 g, 6 g
Examine the image above and select the correct statement below.
NaHCO3 is the limiting reagent in the yellow and blue.
HCl is definitely not the limiting reagent in all three cases.
Equal numbers of moles of HCl and NaHCO3 may have reacted in green.
NaHCO3 is definitely the limiting reagent in all three cases.

12. Energy: Heat: Enthalpy (ΔH)

15. Distillation Oil Refining:
Oil Refining:

16. Energy Diagrams

17. Energy Diagrams

21. Kinetics: Rate & TIME (What is a second?) How fast is a reaction?

24. Calculations Distillation (Course/ Lab Manual pg. 46)

25. Example
24.55 g
52.2 mL
0.990 g/mL

26. Example
24.55 g
52.2 mL
0.990 g/mL
4.5 %

27. Theoretical Yield Calculation
24.55 g
? g (theoretical) 4
Molar mass = g/mol
Molar mass = g/mol
? mol C2H5OH = 4 x mol sucrose
= mol
? mol sucrose = g / g/mol
= mol
? g (theoretical) = mol C2H5OH x g/mol
= g
__________________
? g (actual) = [4.5 % ,that is: 4.5/100] x 52.2 mL x g/mL
= 2.33g
% Yield = g (actual) / g (theoretical) x 100
= 17.6 %

28. Chem 106: Class/ Lab Week 10 Today’s experiment: Completion of
Chemical Reactions/ Fermentation/ Distillation Due & stamped Today
Distillation (Course/ Lab Manual pg. 46)

29. Chem 106: Class/ Lab Week #12 After Spring Break
1) Titration of Vinegar
Quantitative Acid-Base Reaction (Neutralization)
Using a standard NaOH aqueous solution
Determining the % Acetic Acid in vinegar samples
2) Exam 2
Refer to the Course Calendar practice questions
2 pages handwritten notes, which are to be turned in, plus Periodic Table allowed

30. Chem 106: Class/ Lab Week #10
Pick up distillation kit from the stockroom. Assemble as shown. Complete instructions in Lab Manual. Have page 46 stamped before leaving lab. Distillation (Course/ Lab Manual pg. 46)
Turn in Week #12 after Spring Break
Plus: Fermentation Post Lab on-line Ques. Handout
[Handout: Individually done]