Homework 12
1. For the following reactions, identify the acid, base, conjugate acid and conjugate base:
a. HF + H2O → H3O+ + Fb. CN- + H2O → HCN + CNc. HCN + NO2 → HNO2 + CN2. Write a balanced chemical equation to represent each of the following acid-base neutralization
reactions
a. H2SO4 and LiOH
b. Ba(OH)2 and H3PO4
3. Complete the following table:
[H3O+]
pH
6.2 X 10-8
7.21
Acidic or Basic?
Basic
7.2 X 10-8
5.30
1.50 X 10-3
4. Predict whether each of the following pairs of substances could function as a buffer system in
aqueous solution:
a. HNO3 and NaNO3
c. KCl and KCN
b. HF and NaF
d. H2CO3 and NaHCO3
5. Determine the molarity of a NaOH solution when each of the following amounts of acid
neutralizes 25.0 mL of the NaOH solution:
a. 5.00 mL of 0.250 M HNO3
b. 20.00 mL of 0.500 M H2SO4
c. 10.00 mL of 0.100 M H3PO4