Question

Write pH in terms of concentration of hydrogen ion?

(a) [H^+] = 1^-pH

(b) [H^+] = 10^-pH

(c) [H^+] = 10^pH

(d) [H] = 10^-pH

This question was posed to me in an international level competition.

I'm obligated to ask this question of Equilibrium topic in portion Equilibrium of Chemistry – Class 11

Answer 1

Right answer is (b) [H^+] = 10^-pH

To explain I would say: pH is defined as the negative logarithm of hydrogen ion concentration that is pH = -log[H^+]. By rearranging pH in terms of concentration of hydrogen ions, we get [H^+] = 10^-pH. pH means potential of hydrogen.