Question

A solution with $pH=2$ has how many times more hydrogen ion concentration than one with $pH=4$?

• A. 2
• B. 100
• C. 20
• D. 1/100

Answer 1

The correct option is B 100

$pH=-log\left[H^{+}\right]$
$pH=2$
$\therefore H^{+}=Antilog(-2)={10}^{-2}$
$pH=4$
$\therefore H^{+}=Antilog(-4)={10}^{-4}$