Question

The $pH$ of a $0.02M$ solution of hydrochloric acid is:

• A. $2.0$
• B. $1.7$
• C. $0.3$
• D. $2.2$

Answer 1

The correct option is B $1.7$

$\left[H^{+}\right]=2\times {10}^{-2}M$

$\because pH=-\log [2\times {10}^{-2}]$;

$pH=1.7$ i.e. in between $1$ and $2$