Reaction of zinc with Sulpuric acid:

Reaction of zinc with Sulpuric acid:

• Dilute sulphuric acid reacts with zinc evolving hydrogen.

Zn(s) + (dil.) H₂SO₄ →ZnSO₄(aq) + H₂(g)

• Hot and concentrated sulphuric acid attacks zinc giving of sulphur dioxide

Zn(s) + 2H₂SO₄ (Hot and concentrated)  →ZnSO₄(ag) + SO₂(g) + 2H₂O(l)

• A moderately concentrated acid (20%) when heated with the metal evolves hydrogen sulphide and precipitates a little sulphur.

4Zn(s) + 5H₂SO₄  (heat) → 4ZnSO₄(aq) + H₂S(g) + 4H₂O(g)

3Zn(s) + 4H₂SO₄ (heat) → 3ZnSO₄(aq) +S(s) + 4H₂O(l)

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