Question

What happens when zinc granules are treated with dilute solution of H2SO4, HCl, HNO3, NaCl and NaOH? Also write the chemical equations if reaction occurs.

September 15, 2024

Answer

Reagent	Reaction	Products
Dilute H₂SO₄	Zn + H₂SO₄ → ZnSO₄ + H₂↑	Zinc sulfate + Hydrogen gas
Dilute HCl	Zn + 2HCl → ZnCl₂ + H₂↑	Zinc chloride + Hydrogen gas
Dilute HNO₃	Zn + 2HNO₃ → Zn(NO₃)₂ + H₂↑	Zinc nitrate + Hydrogen gas
Conc. HNO₃	Zn + 4HNO₃ → Zn(NO₃)₂ + 2NO₂ + 2H₂O	Zinc nitrate + Nitrogen dioxide + Water
NaCl	No reaction	–
NaOH (hot, conc.)	Zn + 2NaOH + 2H₂O → Na₂Zn(OH)₄	Sodium zincate

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