Question

The number of $H^{+}$ ions in $1ml$ of a solution of $pH=13$ is:

• A. $6.023\times {10}^7$
• B. $1\times {10}^{-13}$
• C. $6.023\times {10}^{13}$
• D. $1\times {10}^{16}$

Answer 1

The correct option is A $6.023\times {10}^7$

$pH=13$

$\left[H^{+}\right]={10}^{-13}mol/L$

So, $1000mL⟶{10}^{-13}mol{H}^{+}$

$1mL⟶\frac{{10}^{-13}}{1000}mol{H}^{+}$

or, ${10}^{-16}\times 6.022\times {10}^{23}{H}^{+}$ ions

$=6.022\times {10}^7{H}^{+}$ ions

Hence, option $A$ is correct.