Balancing Redox Reactions: Acidic Solutions Video Lessons

Concept: Balancing Redox Reactions: Acidic Solutions

# Problem: Complete and balance the following half-reaction: H2SO3(aq) → SO2−4(aq) (acidic solution) Express your answer as a chemical equation. Identify all of the phases in your answer. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.

###### FREE Expert Solution

We are asked to complete the following half-reaction:

H2SO3(aq) → SO2−4(aq) (acidic solution)

Step 1: Balance the non-hydrogen and non-oxygen elements first

H2SO3(aq) → SO2−4(aq)

Step 2: Balance oxygen by adding H2O(l) to the side that needs oxygen (1 O: 1 H2O)

H2SO3(aq) → SO2−4(aq) + H2O(l)

Step 3: Balance hydrogen by adding H+ to the side that needs hydrogen (1 H: 1 H+)

H2SO3(aq) → SO2−4(aq) + H2O(l)

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###### Problem Details

Complete and balance the following half-reaction:

H2SO3(aq) → SO2−4(aq) (acidic solution)

Express your answer as a chemical equation. Identify all of the phases in your answer. Identify all of the phases in your answer. Indicate whether the half-reaction above is an oxidation or a reduction.