Question

The ph of 10^-13 mol dm-3 of an aqueous solution of H2SO4 is
A 3.0
B 2.7
C 2.0
D 1.5

Answer 1

B) 2.7 .............

Answer 2

Answer: The pH of the solution is 12.7

Explanation:

pH is defined as negative logarithm of hydrogen ion concentration. It is basically defined as the power of hydrogen ions in a solution.

The equation used to calculate pH of the solution is:

$pH=-\log[H^+]$

1 mole of sulfuric acid produces 2 moles of hydrogen ions.

We are given:

$[H^+]=2\times 10^{-13}mol/dm^3=2\times 10^{-13}M$

Putting values in above equation, we get:

$pH=-\log(2\times 10^{-13})\\\\pH=12.7$

Hence, the pH of the given $H_2SO_4$ solution is 12.7