When zinc granules react with dilute sulphuric acid, zinc sulphate and hydrogen gas are formed. The reaction is a single displacement reaction, and you may see bubbling as the gas is released.

Equation

Zn (s) + H2SO4 (aq) → ZnSO4 (aq) + H2 (g)\text{Zn (s) + H}_2\text{SO}_4\text{ (aq) → ZnSO}_4\text{ (aq) + H}_2\text{ (g)}Zn (s) + H2​SO4​ (aq) → ZnSO4​ (aq)

  • H2​ (g)

What you observe

  • Effervescence or bubbles appear because hydrogen gas is evolved.
  • The zinc slowly dissolves as the reaction continues.
  • The solution becomes a zinc sulphate solution.

Key point

Zinc is more reactive than hydrogen, so it displaces hydrogen from dilute sulphuric acid.

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