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Question
What happens when a piece of
- zinc metal is added to copper sulphate solution?
- aluminium metal is added to dilute hydrochloric acid?
- silver metal is added to copper sulphate solution?
Also write the balanced chemical equation if the reaction occurs.
Solution
- Metal zinc displaces hydrogen component on reacting with dilute sulphuric acid (H2SO4) as H2 gas which is evolved
`"Zn"("s") + "H"_2"SO"_2("aq") -> "ZnSO"_4("aq") + "H"_2("g")` - 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.
`"NH"_3("g") + "HCl"("g") -> "NH"_4"Cl"("s")` - Copper displaces silver from the aqueous solution of silver nitrate.
`"Cu"("s") + 2"AgNO"_3("aq") -> "Cu"("NO"_3)_2("aq") + 2"Ag"("s")`
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