Question

When a solution reacts with crushed egg-shells to give a gas that turns lime -water milky . the solution contains HCl. explain

Answer 1

yeah sure for your help 

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Your question is 

# When a solution reacts with crushed egg -shells to give a gas that turns lime -water milky . The solution contain HCL  . Explain ?


Here is your answer 


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As we know egg  shell contains Calcium carbonate , Which on reaction with HCL liberates Carbondioxide gas which turn lime water to milky  

CaCO3  + 2HCL ⇒ CaCl2 + H2O + CO2 


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Answer 2

ANSWER :

Lime water turns milky and hence the gas is carbon-dioxide.

We already know that egg shells contain calcium carbonate .

Hence the only thing that can displace is HCl .

Thus the answer is HCl as only an acid can perform the above reaction and displace the calcium carbonate to liberate an acidic gas.

Reaction :

CaCO₃ + 2HCl => CaCl₂ + H₂O + CO₂

CO₂ + Ca(OH)₂=>CaCO₃ + H₂O ( limewater turns milky )