Question

What is the pH of a Weak Acid solution whose concentration is 10-4M?

Answer 1

Explanation:

We are given: concentration of a weak acid = 10^-4 M

$\begin{gathered} pH\text{ = -log\lbrack H}^+] \\ \\ \text{ = -log\lbrack10}^{-4}] \\ \\ \text{ = 4} \end{gathered}$

Answer:

The pH of a weak acid is 4.