Question

What happens when. Give balanced chemical equations.

i) Zinc reacts with dil. hydrochloric acid.

ii) Dilute Hydrochloric acid is added to sodium carbonate.

iii) Dil. hydrochloric acid is added to sodium hydrogen carbonate.

iv) Carbon-di-oxide is passed through lime water in limited amount.

v) Carbon-di-oxide is passed through lime water in excess amount.​

Answer 1

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1. Zn+ 2HCl=Zn2HCl
2. 2Hcl+NaCo3=NaCl+Co2 +H2O
3. Hcl+NaHCo3=NaCl+Co2 +H2O
4. CO2+CaCo3=CaO+Co2+O2
5. same as 4

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Answer 2

Zn + 2HCl ---------》ZnCl2 + H2

Na2CO3 + 2HCl -------》2Nacl + Co2 + H20

HCl + NaHCo3 --------》NaCl + H20 + CO2

Ca(OH)2 + CO2 ---------》 CaCO3 + H20

Ca(OH)2 + 2CO2 ------》Ca(HCO3)2