Write a balanced half-reaction for the reduction of gaseous oxygen to aqueous hydrogen peroxide in acidic aqueous solution. be sure to add physical state symbols where appropriate.

Question

Chemistry

Roderick Baird

7 December, 07:39

Write a balanced half-reaction for the reduction of gaseous oxygen to aqueous hydrogen peroxide in acidic aqueous solution. be sure to add physical state symbols where appropriate.

+1

Answers (1)

Know the Answer?

Dominick Dudley · Answer 1

First, the reduction of gaseous oxygen to aqueous hydrogen peroxide is:

O2 (g) → H2O2 (l)

when this reaction in acidic aqueous solution, and we need to balance H on both sides so we will use H + on the left side.

O2 (g) + H + (aq) → H2O2 (l)

now we have 1 of H atom on the left side and 2 in the right side so we will but 2H + on the left side instead of H+:

O2 (g) + 2H + (aq) → H2O2 (l)

now we need to balance the 2 positive charge of 2H + so, we will put 2 e - on the left side:

O2 (g) + 2H + (aq) + 2 e - → H2O2 (l)

and this is the final balanced equation which has equal no. of atoms on both sides:

2 of O atom, 2 of H atom on both sides.