A solution has a pH of 11. What is its hydrogen ion concentration [H+]?
- A. 1 × 10^-11 M ✓
- B. 1 × 10^11 M
- C. 1 × 10^-12 M
- D. 1 × 10^-10 M
Correct answer
A. 1 × 10^-11 M
Explanation
pH = -log[H+], so [H+] = 10^-pH = 10^-11 = 1 × 10^-11 M.
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