Question

Что не относиться к окислительно-восстановительным реакциям? 1)Cu+HNO3-->Cu(NO3)2 + H2O + NO2 2) Cuo + P2O5 --> Cu3(PO4)2 3) Cuo + H2 --> Cu + H2O 4) Cu + H2SO4 --> CUSo4 + H2o + SO2

Answer 1

Реакция взаимодействия оксида меди (II) с оксидом фосфора (V) не ОВР, т.к. в процессе реакции степени окисления атомов реагирующих веществ не изменяются.

Answer 2

What is an oxidation-reduction reaction?

An oxidation-reduction (redox) reaction is a chemical reaction that involves the transfer of electrons between reactants. In these reactions, one reactant undergoes oxidation (loses electrons) while another reactant undergoes reduction (gains electrons). The reactant that loses electrons is called the reducing agent, while the reactant that gains electrons is called the oxidizing agent.

Identifying the reactions that do not involve redox reactions

Let's analyze each of the given reactions to determine which ones do not involve oxidation-reduction reactions.

1) Cu + HNO3 --> Cu(NO3)2 + H2O + NO2 - This reaction involves the oxidation of Cu to Cu(II) and the reduction of HNO3 to NO2. Therefore, it is an oxidation-reduction reaction.

2) CuO + P2O5 --> Cu3(PO4)2 - This reaction involves the reduction of P2O5 to Cu3(PO4)2. Therefore, it is an oxidation-reduction reaction.

3) CuO + H2 --> Cu + H2O - This reaction involves the reduction of CuO to Cu. Therefore, it is an oxidation-reduction reaction.

4) Cu + H2SO4 --> CuSO4 + H2O + SO2 - This reaction involves the oxidation of Cu to Cu(II) and the reduction of H2SO4 to SO2. Therefore, it is an oxidation-reduction reaction.

Based on the analysis, all of the given reactions involve oxidation-reduction reactions. None of them can be excluded as not involving redox reactions.

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