What happens when a piece of

Question:

What happens when a piece of

(a) zinc metal is added to copper sulphate solution ?

(b) aluminium metal is added to dilute hydrochloric acid ?

(c) silver metal is added to copper sulphate solution ?

Also write the balanced chemical equation if the reaction occurs.

Solution:

(a) Metal zinc displaces hydrogen component on reacting with dilute sulphuric acid (H2SO4) as H2 gas which is evolved

Zn(s) + H2SO2(aq) ———-> ZnSO4(aq) + H2(g)

(b) Ammonia and hydrogen chloride gas. When vapours of ammonia and hydrogen chloride gas are mixed, the compound formed is ammonium

chloride. It is a white solid.

NH3(g) + HCl(g) ———-> NH4Cl (s)

(c) Copper displaces silver from the aqueous solution of silver nitrate.

Cu(s) + 2AgNO3(aq) ——–> Cu(NO3)2(aq) + 2Ag(s)

 

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