Question

The concentration of hydrogen ion in a sample of soft drink is $3.8\times {10}^{–3}M$. what is its pH?

Answer 1

Given,
$\left[H^{+}\right]=3.8\times {10}^{-3}M$
$\therefore$ pH value of soft drink
$=-log\left[H^{+}\right]=-log(3.8\times {10}^{-3})=-log3.8-log{10}^{-3}=-log3.8+3=-0.58+3=2.42$