Question

What is the hydrogen ion concentration, [h+ ], in a 0.043 m solution of sulfuric acid (h2so4)?

Answer 1

each mole of H2SO4 contains 2 moles of [H+]
hence H+ concentration is 0.086M.

Answer 2

Answer : The hydrogen ion concentration is 0.086 mole/L.

Solution : Given,

Concentration of sulfuric acid = 0.043 mole/L

When sulfuric acid dissolved in water, it gives hydrogen ion and sulfate ion.

$H_2SO_4(aq)\rightarrow 2H^+(aq)+SO^{2-}_4(aq)$

From the reaction, we conclude that the 1 mole of sulfuric acid dissociates to give 2 mole of hydrogen ion and 1 mole of sulfate ion.

1 mole of sulfuric acid in 1 liter solution gives 2 mole of $H^+$ ion

0.043 mole of sulfuric acid in 1 liter solution gives $2\times 0.043=0.086mole$ of $H^+$ ion

Therefore, the hydrogen ion concentration is 0.086 mole/L.