In the balanced redox reaction: 2 cu (s) + s (s) ® cu2s (s), how many electrons are gained or lost by each copper atom? select one:

a. each copper atom gains two (2) electrons.

b. each copper atom gains one (1) electron.

c. each copper atom loses one (1) electron.

d. each copper atom loses two (2) electrons.

Question

Chemistry

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1 August, 11:23

In the balanced redox reaction: 2 cu (s) + s (s) ® cu2s (s), how many electrons are gained or lost by each copper atom? select one:

a. each copper atom gains two (2) electrons.

b. each copper atom gains one (1) electron.

c. each copper atom loses one (1) electron.

d. each copper atom loses two (2) electrons.

+2

Answers (1)

Know the Answer?

Maria Avila · Answer 1

The answer: C) each copper atom loses one (1) electron.

2Cu + S ⇒ Cu₂S

2Cu⁰ ⇒ 2Cu⁺ + 2e⁻ oxydation

2e⁻ + S⁰ ⇒ S⁻² reduction

In the reaction, copper is oxidized and it releases an electron and transfers it to the sulfur atom. In contrast to copper, sulfur is reduced and it receives two electrons.