Question

Use the chemical equation to answer the question.

2Ag(s) + H2S(g) → Ag2S(s) + H2(g)

Does this equation represent a redox reaction?

(1 point)
Responses

No, it does not because sulfur (S) does not change oxidation states.
No, it does not because sulfur (S) does not change oxidation states.

No, it does not because neither hydrogen (H) nor silver (Ag) transfers electrons.
No, it does not because neither hydrogen (H) nor silver (Ag) transfers electrons.

Yes, it does because hydrogen (H) undergoes reduction and silver (Ag) undergoes oxidation.
Yes, it does because hydrogen (H) undergoes reduction and silver (Ag) undergoes oxidation.

Yes, it does because silver (Ag) undergoes reduction and hydrogen (H) undergoes oxidation.

Answer 1

Yes. Ag is oxidized (Ag: 0 → +1) and H is reduced (H: +1 → 0); S remains −2. Therefore electrons are transferred and the reaction is a redox reaction.