Question

What is the pH of a solution with a concentration of 2.4 × 10-5 molar H3O+? Show, or explain, the work used to solve this problem.

Answer 1

$pH=-log|H_{3}O^{+}|\\\\ pH=-log2.4*10^{-5}=-(log2.4+log10^{-5})=-(0,38-5)=-(-4.62)\\\\ pH=4.62$

Answer 2

Answer:

The pH of the solution is 4.61.

Explanation:

The pH of the solution is defined as negative logarithm of $H_3O^+$ ion concentration.

$pH=-\log[H_3O^+]$

The concentration of $H_3O^+=2.4\times 10^{-5} molar$

$pH=-\log[2.4\times 10^{-5} M]=4.61$

The pH of the solution is 4.61.