Answer to Question #52365 in Inorganic Chemistry for palashkumarmura

Question #52365
Which one reduces CuSO4 1) KCN. 2) KF. 3) NH3. 4) HNO3
Expert's answer
In CuSO4, the oxidation number of Cu is +2, when reacting it can be changed to 0. That's why in such case CuSO4 is reducing, and it is an oxidizing agent. CuSO4 can be reduced by compound element in which changes its oxidation number from smaller to greater. For example, NH3 (N is oxidized, because its oxidation nunmber increases from -3 to 0).
Answer: NH3

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