# Chapter 20 - Oxidation-Reduction Reactions - 20.2 Oxidation Numbers - Sample Problem 20.4 - Page 706: 15

a) N in NH$_{4}$$^{+} is the reducing agent. N in NO_{2}$$^{-}$ is the oxidizing agent. b) Pb is the oxidizing agent. I$^{-}$ is the reducing agent.

#### Work Step by Step

a) N in NH$_{4}$$^{+} is the reducing agent. N in NO_{2}$$^{-}$ is the oxidizing agent. b) Pb is the oxidizing agent. I$^{-}$ is the reducing agent.

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