Calculate the pH of a 0.005M H2SO4 which dissociated completely in water

1 answer

H2SO4 is a strong acid and will dissociate completely in water into H+ and SO4 2- ions.

Since H2SO4 is a diprotic acid, it will produce 2 moles of H+ ions for every mole of H2SO4 that dissociates.

Therefore, the concentration of H+ ions in the solution would be 0.005M x 2 = 0.01M

Since pH is defined as the negative logarithm of the hydrogen ion concentration:

pH = -log(0.01)
pH = 2

Therefore, the pH of a 0.005M H2SO4 solution is 2.