Name: ________________________________
Date: ___________
Multi-Step pH and pOH Problems
1. P. 659 #16: Calculate the pH of each solution.
a. [OH–] = 4.3 × 10–5 M
i. pOH = –log(4.3 × 10–5) = 4.37; pH = 9.63
–
b. [OH ] = 4.5 × 10–11 M
i. pOH = –log(4.5 × 10–11) = 10.35; pH = 3.65
2. P. 662 #24: What are the hydroxide ion concentrations for solutions with the following pH values?
a. 6.00
i. pOH = 8; [OH–] = 1 × 10–8 M
b. 9.00
i. pOH = 5; [OH–] = 1 × 10–5 M
c. 12.00
i. pOH = 2; [OH–] = 1 × 10–2 M
3. Determine the pH of a solution with [OH–] = 2.8 × 10–5 M. Is this solution acidic or basic?
a. pOH = –log(2.8 × 10–5) = 4.55; pH = 9.45, BASIC
4. Calculate the [OH–] for a solution of pH = 3.19.
a. pOH = 10.81; [OH–] = 10–10.81; [OH–] = 1.55 × 10–11 M
5. What is the hydrogen ion concentration of a solution that has a pOH of 9.35? Is the solution acidic or
basic?
a. pH = 4.65; [H+] = 10–4.65; [H+] = 2.24 × 10–5 M, ACIDIC
6. What is the pOH of a solution with [H+] = 1.4 × 10–9 M? Is the solution acidic or basic?
a. pH = –log(1.4 × 10–9) = 8.85; pOH = 5.15, BASIC
Name: ________________________________
Multi-Step pH and pOH Problems
1. P. 659 #16: Calculate the pH of each solution.
a. [OH–] = 4.3 × 10–5 M
Date: ___________
b. [OH–] = 4.5 × 10–11 M
2. P. 662 #24: What are the hydroxide ion concentrations for solutions with the following pH values?
a. 6.00
b. 9.00
c. 12.00
3. Determine the pH of a solution with [OH–] = 2.8 × 10–5 M. Is this solution acidic or basic?
4. Calculate the [OH–] for a solution of pH = 3.19.
5. What is the hydrogen ion concentration of a solution that has a pOH of 9.35? Is the solution acidic or
basic?
6. What is the pOH of a solution with [H+] = 1.4 × 10–9 M? Is the solution acidic or basic?