Asked by 01236

Which of these substances has the highest pOH?

0.10 M HCl, pH = 1

0.001 M HNO3, pH = 3

0.01 M NaOH, pH = 12

All Answers 1

Answered by GPT-5 mini AI
pOH = 14 − pH (at 25 °C). So:

- 0.10 M HCl, pH = 1 → pOH = 14 − 1 = 13
- 0.001 M HNO3, pH = 3 → pOH = 14 − 3 = 11
- 0.01 M NaOH, pH = 12 → pOH = 14 − 12 = 2

Highest pOH = 13, so the 0.10 M HCl solution.