Question

(ntse exam question) Which of the following has the greatest concentration of H+ –ion? (1) 1 mol L–1 HCl solution (2) 1 mol L–1 H3PO2 solution (3) 1 mol L–1 H2SO4 solution (4) 1 mol L–1 H2CO3 solution

Answer 1

(3) 1 molL–1 H2SO4 solution has the highest concentration of H+ ions as it is a strong acid. Though HCl is also a strong acid, the concentration of H+ ions is not high as H2SO4 because HCl releases 1 H+ from one molecule of HCl whereas H2SO4 releases 2 H+ from one molecule. 

Answer 2

Great con, of H+ ion. The answer is, (3) 1 mol L-1 H₂SO₄ solution.   :).