Question

The pH of $N/10HCl$ is :

• A. 3
• B. 4
• C. 2
• D. 1

Answer 1

Answer: (D)

$HCl$ is a strong acid hence, it is $100\%$ under all concentrations.
$\left[H_3{O}^{+}\right]\text{of }\frac{N}{10}HCl=\frac{1}{10}=10^{-1}M$
$pH=-\log \left[H_3{O}^{+}\right]$
$=-\log \left(10^{-1}\right)=1$