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Acids, bases and salt
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06/09/2021 1:12 pm
Topic starter
(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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06/09/2021 1:22 pm
(a) When zinc granules are heated with sodium hydroxide solution, then sodium zincate salt and hydrogen gas are formed.
2NaOH(aq) + Zn(s) + Heat → Na2ZnO2(aq) + H2(g)
Sodium Hydroxide Zinc Sodium Zincate Hydrogen
(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.
Ca(OH)2(aq) + CO2(g) → CaCO3(s) + H2O