Question

Which of the following is an oxidation-reduction reaction?
ZnS(s) + 2O2(g) mc011-1.jpg ZnSO4(s)
CaO(s) + H2O(l) mc011-2.jpg Ca(OH)2(s)
6Li2O(s) + P4O10(g) mc011-3.jpg 4Li3PO4(s)
SO2(g) + H2O(l) mc011-4.jpg H2SO3(aq)

Answer 1

Answer on Question #64954 - Chemistry – Other

Task:

Which of the following is an oxidation-reduction reaction?

1) ZnS(s) + 2O₂(g) = ZnSO₄(s);

2) CaO(s) + H₂O(l) = Ca(OH)₂(s);

3) 6Li₂O(s) + P₄O₁₀(g) = 4Li₃PO₄(s);

4) SO₂(g) + H₂O(l) = H₂SO₃(ag).

Solution:

1) ZnS(s) + 2O₂(g) = ZnSO₄(s);

Sulfur and oxygen are changing the degree of oxidation.

Reaction (1) - oxidation-reduction reaction

O₂ - oxidizing agent;

ZnS - reducing agent.

2) CaO(s) + H₂O(l) = Ca(OH)₂(s);

The elements do not change the oxidation state

3) 6Li₂O(s) + P₄O₁₀(g) = 4Li₃PO₄(s);

The elements do not change the oxidation state

4) SO₂(g) + H₂O(l) = H₂SO₃(aq);

The elements do not change the oxidation state

Answer:

1) ZnS(s) + 2O₂(g) = ZnSO₄(s) - oxidation-reduction reaction.

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