Respuesta :

Answer:

S

Explanation:

In the starting materials, sulfur has the oxidation number +6 and in the reaction products it has the oxidation number +4. With that it was reduced.

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Sulphur (S) is the element that is reduced in the chemical reaction.

REDOX REACTION:

  • A redox (oxidation-reduction) reaction is a reaction that involves a change in the oxidation number of elements involved in the reaction.

  • The following redox reaction is given: Cu + 2H2SO4 → CuSO4 + SO2 + 2H2O

  • In the above equation, Cu is oxidized from an oxidation state of 0 to +2 (in CuSO4).

  • However, sulphur (S) in H2SO4 is reduced from an oxidation state of +6 to +4 in Sulphur dioxide (SO2).

  • Therefore, Sulphur (S) is the element that is reduced in the chemical reaction.

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