Problem: What are the oxidation numbers of chlorine on the reactant side and on the product side in the following redox reaction? 2 OH - (aq)  +  Cl2O7 (g)  +   4 H2O2 (aq)  →  2 ClO2 - (aq)  +   4 O2 (g)  +   5 H2O (l)  A. Reactant: –1; product: +3 B. Reactant: +7; product: +3 C. Reactant: +14; product: –1 D. Reactant: +7; product: +4 E. Reactant: 0; product: –1

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What are the oxidation numbers of chlorine on the reactant side and on the product side in the following redox reaction?

2 OH - (aq)  +  Cl2O7 (g)  +   4 H2O2 (aq)  →  2 ClO2 - (aq)  +   4 O2 (g)  +   5 H2O (l) 

A. Reactant: –1; product: +3

B. Reactant: +7; product: +3

C. Reactant: +14; product: –1

D. Reactant: +7; product: +4

E. Reactant: 0; product: –1

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