Question

A certain amount of hydrogen peroxide was dissolved in 100 mL of water and then titrated with 1.68 M KMnO[sub]4[/sub]. How much H[sub]2[/sub]O[sub]2[/sub] was dissolved if the titration required 18.3 mL of the KMnO[sub]4[/sub] solution?


2KMnO[sub]4[/sub](aq) + H[sub]2[/sub]O[sub]2[/sub](aq) + 3H[sub]2[/sub]SO[sub]4[/sub](aq) → 3O[sub]2[/sub](g) + 2MnSO[sub]4[/sub](aq) + K[sub]2[/sub]SO[sub]4[/sub](aq) + 4H[sub]2[/sub]O(l)