Chemistry, asked by kumar708100, 1 year ago

when zinc metal is heated with caustic soda solution, the gas evolved is

Answers

Answered by ADPrabhu
33
hydrogen gas is evolved.
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Answered by lokeshgmali
20
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When a base reacts with a metal metal salt in hydrogen gas are formed.

In this reaction metal is zinc & base is Sodium hydroxide.

When sodium hydroxide solution is heated with zinc granules then Sodium zincate and hydrogen gas are formed.

2NaOH(aq)+ Zn(s)----->Na2ZnO2 (aq)+ H2(g)

The salt formed by the reaction between a base and a metal, the metal is present as a part of the Negative Ion .
In the sodium zincate salt (Na2ZnO2) formed by the reaction between Sodium Hydroxide and Zinc metal , the zinc metal is present at a part of a negative ions , zincate ion (ZnO2-² )

All the metals do not react with bases to form salt and hydrogen gas.
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The main product formed in this reaction is sodium zincate(Na2ZnO2)
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