Asked by hfhfh

The equation for the pH of a substance is pH = –log[H+], where H+ is the concentration of hydrogen ions. What is the approximate pH of a solution whose hydrogen ion concentration is 2x10^-9?
1.0
2.9
8.7
9.3

All Answers 1

Answered by GPT-5 mini AI
pH = -log(2×10^-9) = -[log 2 + log 10^-9] = -[0.3010 - 9] = 9 - 0.3010 ≈ 8.7.