Chapter 14 AcidBase Review
1. The value of the Ka for hypochlorous acid,
HClO, is 3.1 x 10-8. Calculate the hydronium
ion concentration of a 0.50 molar solution of
HOCl.
2. A solution is prepared by the reaction:
Cl2 + H2O
HCl + HOCl Calculate the
pH of the solution if enough chlorine is
added to water to make the concentration
equal to 0.0040M HCl
3. Methylamine, CH3NH2 + H2O
CH3NH3+
+ OH At 25C the percentage of ionization
in a 0.160M solution of CH3NH2 is 4.7%.
Calculate the [OH-], [CH3NH3+],[CH3NH2],
[H3O+], and the pH of a 0.160M solution of
CH3NH2 at 25C.
4. Using the information from question #3,
calculate the value for Kb, the ionization
constant for CH3NH2 at 25C.
12. At 50C, the Kw = 5.48 x 10-14. What is the
[H3O+] in neutral water at 50C?
13. What is the pH of a 0.1M KOH solution?
14. What is the pH of a 3.18M ethanoic solution
at 25C. Ka = 1.8 x 10-5? (CH3COOH).
15. What is the pH of a 0.0536M NaOH solution
at 25C.
16. What is the pH of a 2.54M NH2CH3solution at
25C? Kb = 5.0 x 10-4
17. What is the percent ionization of a 3.14M
CH3COOH solution at 25C, where the Ka = 1.8
x 10-8?
18. Of the following salts: NaF, NaCl, NaBr,
NaNO2 and NaNO3, which ones would form a
neutral solution?
19. At 25C, what is the pH of a 1.75M solution of
sodium cyanide solution? Ka = 6.2 x 10-10
5. The Ka for propanoic acid, C2H5COOH, is 1.3 x
10-5. Calculate the ion concentration, [H+], in
a 0.20M solution of Propanoic acid.
20. Oxalic acid, H2C2O4, is a diprotic acid with Ka1
= 5.6 x 10-2 and Ka2 = 5.1 x 10-5. What is the
equilibrium constant for the following
reaction?
H2C2O4 + 2H2O
2H3O+ + C2O42-?
6. Using the information from question #5,
calculate the percentage of propanoic acid
molecules that are ionized in the solution.
21. Which of the following compounds is the
strongest acid: HCl, HClO, HClO2, HClO3,
HClO4?
7. Determine if the following 0.10M solutions
are acidic, basic or neutral: Al(NO3)3, K2CO3,
NaHSO4, and NH4Cl.
22. Write the net ionic equation for the reaction
of sodium hydroxide and nitrous acid.
8. In the following equation: HF + H2O
H3O+ + F- , identify the acid, base,
conjugate acid and conjugate base.
9. Identify the conjugate base of HCO3- and the
conjugate acid of SO32-.
10. Write the net ionic equation for the reaction
of nitric acid with ammonia.
11. What is the pH of a 0.1M nitric acid solution?
23. Write the net ionic equation for the reaction
of ethanoic acid (acetic acid) with sodium
hydroxide.