# 1. Balance the following redox reactions using the half-reaction method make sure to include at...

## Question:

1. Balance the following redox reactions using the half-reaction method; make sure to include at least the following steps, as needed:

• writing out the reduction and oxidation reactions separately
• balancing the atoms in each half-reaction
• balancing the charge in each half-reaction
• balancing the electrons between the oxidation and reduction reactions
• simplifying terms (and adding {eq}\, \rm OH^-\, {/eq} in basic reactions)
• having a completely balanced reaction

a. {eq}\, \rm S^{2-} + Cr_2O_7^{2-} \longrightarrow S + Cr^{3+}\ (acidic\ solution) \, {/eq}

b. {eq}\, \rm CrO^{-4} + Fe(OH)_2 \longrightarrow Cr(OH)_3 + Fe(OH)_3\ (basic\ solution) \, {/eq}

## Redox Reaction

Oxidation reaction occurs when a species loses electrons while reduction reaction takes place when a species gains electrons. The combination of an oxidation and reduction reaction is called a redox reaction.

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### Part a.

Step 1: Write the reduction and oxidation reactions separately.

Reduction: {eq} \rm Cr_2O_7^{2-} \to Cr^{3+} {/eq}

Oxidation: {eq} \rm...