Question

What is pH?

• A. Logarithm of molar concentration of protons
• B. Molar concentration of protons
• C. Negative concentration of hydrogen ions
• D. Negative logarithm of molar concentration of protons

Answer 1

Answer: (D)

Negative logarithm of molar concentration of protons

pH is the negative logarithm of the concentration of hydrogen ions in moles per liter. It is represented as follows:
$pH=-log\left[H^{+}\right]$