Chapter 12 Reading Guide Name ____________________________________

Section 12.1

1. What does a cookie recipe tell you?
2. How is a balanced equation like a recipe?
3. How is building a tricycle like a balanced equation?
4. What do chemists use a balanced equation for?
5. What does quantity usually mean?
6. What is stoichiometry?
7. How can a balanced equation be interpreted in terms of atoms?
8. How can a balanced equation be interpreted in terms of molecules?
9. How can a balanced equation be interpreted in terms of moles?
10. How can a balanced equation be interpreted in terms of mass?
11. How can a balanced equation be interpreted in terms of volume?
12. What is conserved in every chemical reaction?

Section 12.2

1. Where do you get the numbers for a mole ratio?
2. What can the mole ratio be used for?
3. How is the amount of substance usually measured?
4. What do they do with the mass?
5. What are the steps for a mass-mass problem?
6. When is the first step skipped?
7. When is the last conversion factor skipped?
8. How is the typical stoichiometry problem solved?
9. For reactions involving gases what do the coefficients indicate?
10. What happened to the 22.4 L/mole factors in sample problem 12.5?

Section 12.3

1. What limited the amount of lasagna in their example? Why?
2. What will limit the amount of product in a reaction?
3. What is a limiting reagent?
4. What is an excess reagent?
5. In Sample 12.7 Why was copper the limiting reagent even though they had less sulfur?
6. What is a theoretical yield?
7. What is the actual yield?
8. What is the percent yield?
9. What does the percent yield measure?
10. Why would percent yields be less than 100%?