Question

The number of $H^{+}$ ions in 1 cc of a solution, having pH = 13, is

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

Answer 1

The correct option is A

$6.023\times {10}^7$

Given the pH of solution = 13
$\therefore \left[H^{+}\right]={10}^{-13}mol/litre$
$={10}^{-13}\times 6.023\times {10}^{23}{H}^{+}ions/litre$
$=6.023\times {10}^{10}{H}^{+}ions/litre$
$=6.023\times {10}^{10}\times {10}^{-3}{H}^{+}ions/mL$
$=6.023\times {10}^7{H}^{+}/mL$