Question

The pH of a solution of hydrochloric acid is 4. The molarity of this solution is

• A. 4.0
• B. 0.4
• C. 0.0001
• D. 0.04

Answer 1

Answer: (C)

$pH=-\log [H^{+}]$ $[H^{+}]={10}^{-pH}={10}^{-4}mol{L}^{-1}$