Example Exercise 17.1 Calculating Oxidation Numbers for Carbon

Note that the oxidation number of S remains constant (– 2). The oxidizing agent is CuS because it causes hydrogen to be oxidized from 0 to +1. The reducing agent is H. 2. because it causes copper to be reduced from +2 to 0. Solution. An oxidation –reduction reaction occurs when a stream of hydrogen gas is passed over hot copper(II) sulfide. ................
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