Question

What happen when zinc scrap is heated with concentrated NaOH solution ?

Answer 1

1. Question⇒ What happen when zinc scrap is heated with concentrated NaOH solution ?

Explanation:

• 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.
• _____________________________
• The main product formed in this reaction is sodium zincate(Na2ZnO2)
• _____________________________
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