Question

What is the pH of a solution when the concentration of hydrogen ions \([H^+]\) is \( 1 \times 10^{-5} \, \text{mol/L} \)?

• A. 5
• B. 9
• C. 7
• D. 4

Hint:

The pH is the negative logarithm of the hydrogen ion concentration. A pH of 7 is neutral.