Question

Find pH of 5 x 10^-9 M H2SO4.

Answer 1

h2so4 -> 2H+
which means 2 moles each for each mole of h2so4
meaning 10*10^-9 = 10^-8 moles per litre of H+
pH = - log(10^-8)[base 10]
= 8

Answer 2

pH = - log(10^-8)[base 10]
= 8