Question

write balanced chemical equation for the following statement (a) NaoH solution is heated with zinc granules (b) excess of Co2 gas is passed through lime water (c) Dilute sulphuric acid react with sodium carbonates (d) egg shell are dropped in hydrochloric acid (e) copper (11) oxide reacts with dilute hydrochloric acid

Answer 1

Hello dear ,
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●(a) 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)


●(b)When carbon dioxide gas is passed through lime water, it turns milky or turbid due to the formation of calcium carbonate which is insoluble in water. Following is the chemical equation for the reaction

 Ca(OH)2 + CO2 → CaCO3 + H2O 

However, when excess of carbon dioxide is passed through the solution, the turbidity disappears and a clear solution is obtained due to the formation of calcium bicarbonate, which is soluble in water. Following is the chemical equation for the reaction

 CaCO3 + H2O + CO2 → Ca(HCO3)2  


●(c)Carbon dioxide gas is evolved.

H2SO4 + NaHCO3 --> NA2SO4 + H2O + CO2


●(d) The balanced reaction reaction scheme is expressed below,

2HCl + CaCO3 = CaCl2 + H2O + CO2

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Hope it helps u !!

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Answer 2

Heyaaa

Here is ur answer