Chapter 15 Review Sheet



Solutions, Acids, & Bases Review Sheet

1. 150 mL of ethanol is mixed with 1 L of water. Which is the solute, ethanol or

water?

2. Which of the molecules below would you predict to be soluble in water ?

a. NH3 b. CF4 c. SiO2

3. A student stirred 5.0 g of table sugar into 250. g of hot coffee. What is the mass

percent of sugar in the coffee ?

4. Calculate mass percents for the solutions below.

a. 6.5 g KOH in 250. g water

b. 150. g acetone in 438 g water

5. 150.5 g of NaOH are dissolved in water. The final volume of the solution is 3.8 L.

What is the molarity of the solution ?

6. 2.5 L of a solution of KI in water has a concentration of 0.15 M. How many grams of

KI are in the solution ?

7. How many moles of Cl - are present in 1.5 L of a 0.48 M solution of MgCl2 in water ?

8. How many grams of NaOH are needed to make 1.50 L of a 0.650 M NaOH solution?

9. What volume of 12 M HCl solution is needed to make 2.5 L of 1.0 M HCl ?

11. What volume of 18 M H2SO4 stock solution is needed to make 1855 mL of 0.65 M

H2SO4 ?

Identify each acid, base, conjugate acid, and conjugate base.

12. HNO2 + H2O ( H3O+ + NO2-

13. HBrO4 + H2O ( H3O+ + BrO4-

Complete the equation for each of the following conjugate acid-conjugate base reactions.

14. HF + CH3COO - (

15. NH4+ + F- (

16. At 25 (C what is the [OH-] of a solution for which [H+] = 4.5 ( 10-3 M?

17. What is the pH of a solution in which [H+] = 1.1 ( 10-4 M?

18. What is the pH of a solution in which [OH-] = 8.23 ( 10-6 M?

19. What is the pOH of a solution in which [OH-] = 5.2 ( 10-2 M?

20. A solution of NaOH in water has a pH of 10.3. What is the [H+]?

21. What is the pH of a 2.1 ( 10-3 M solution of HCl?

22. Calculate the [H+] or [OH-] for the solutions below.

a. Milk has a pH of 6.9. What is the [H+]?

b. Oven cleaner has a pH of 13.4. What is the [OH-]?

c. A detergent has a pOH of 4.7. What is the [OH-]?

23. The expression for the dissociation of water is Kw = [H+][OH-]. Why does liquid water appear in this expression?

24. For any solution, what is the relationship between pH and pOH?

25. Identify the following as strong electrolytes, weak electrolytes, or non-electrolytes:

a. NaOH (aq) b. NH3 (aq) c. HI (aq) d. MgCl2 (aq)

e. MgCO3 (s) f. KOH (aq) g. HClO3 (aq) h. HCl (aq)

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