The pH of a basic solution is 9.77. What is [OH⁻]?

Question

The pH of a basic solution is 9.77. What is [OH⁻]?

Answer 1

Equations:

pH = -log [H]

[H] = 10^ -pH

pOH = -log [OH]

[OH] = 10^ -pOH

pH + pOH = 14

Converting pH to pOH

9.77 + pOH = 14

pOH = 14 - 9.77 = 4.23

Converting pOH to [OH]

pOH = -log [OH]

4.23 = -log [OH]

10^ -pOH = [OH]

[OH] = 10^ -4.23 = 5.89*10^5 M