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) 

(S: already balanced)


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)         

(H: already balanced)                                                                          

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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.