State what happens when zinc granules are heated with sodium hydroxide. Write balanced equation and the name of main product formed
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CHEMISTRY
(a) What happens when zinc granules are heated with sodium hydroxide solution? Write equation of the reaction which takes place.
(b) What happens when bases react with non-metal oxides? Explain with the help of an example. What does this reaction tell us about the nature of non-metal oxides?
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ANSWER
(a) When zinc granules are heated with sodium hydroxide solution, then sodium zincate salt and hydrogen gas are formed.
Sodium hydroxide (Base)
2NaOH(aq)
+
Zinc
Zn(s)
Heat
Sodium zincate (salt)
Na
2
ZnO
2
(aq)
+
Hydrogen
H
2
(g)
(b) When bases react with non metal oxides, then salt and water are formed. Example: Calcium hydroxide reacts with carbon dioxide to form calcium carbonate and water.
calcium hydroxide (Base)
Ca(OH)
2
(aq)
+
carbon dioxide (Non−metal oxide)
CO
2
(g)
→
Calcium Carbonate (salt)
CaCO
3
(s)
+
water
H
2
O(l)
Above reaction tell us that non-metal oxides are acidic in nature.
Explanation:
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