1. Unit 3 Exam Review

2. Question 1
Acetone in Styrofoam: physical or chemical change?

3. Question 2
Name two ways to recognize a chemical reaction has occurred.

4. Question 3
Why is boiling water a physical change?

5. Question 4
A physical change is a change in size or a change in _______.

6. Question 5
What is the difference between a physical/chemical property and a physical/chemical change?
Give examples:

7. Question 6
Do reactants or products have more energy in an exothermic reaction?

8. Question 7
What does a catalyst do?
Draw it on the graph:

9. Question 8
What is a real-life example of an inhibitor?

10. Question 9
If I wanted to slow down a reaction, what could I do?

11. Question 10
How does surface area affect the speed of a reaction?

12. Question 11
How do sugar and salt dissolve differently?

13. Question 12
What is the universal solvent?

14. Question 13 Name the solute and solvent for milk:
What type of mixture is milk?

15. Question 14
What is the difference between saturated solutions and supersaturated solutions?

16. Question 15 Balance and Identify: ____K(ClO3)  ____KCl + ____O2
Type of reaction:_______________

17. Question 16 Balance and Identify:
____C6H6 + ____O2  ____H2O + ____CO2
Type of Reaction: ____________

18. Question 17 Balance and Identify:
____Mg(OH)2 + ____H2(SO4)  ____Mg(SO4) + ____H2O
Type of Reaction: ____________

19. Question 18 What ion do acids make in solution?
What ion do bases make in solution?

20. Question 19 What is the acid in the following reaction?
H2(SO4) + H2O  H3O+ + SO42-

21. Question 20
What are the two products of a neutralization reaction between an acid and a base?

22. Honors Continued Question 21
What is the difference between physical and chemical equilibrium?

23. Question 22 What is the purpose of a mole ratio?
Where does a mole ratio come from?

24. Question 23 Solve the following problem:
Convert grams of NaH(CO3) into moles of NaH(CO3).

25. Question 24
Using the following equation, solve the problem before. **Balance First**
____C3H8 + ____O2  ____CO2 + ____H2O
If I had 13 moles of oxygen gas reacted, how many moles of water would be produced?

26. Question 25 Balance this super difficult equation:
____Cu + ____H(NO3)  ____Cu(NO3)2 + ____NO + ____H2O