Question

a student dropped few pieces of marble in dilute HCl kept in the test tube the gas evolved was the passed through lime water what change would be observed in lime water write the chemical equation for the words change​

Answer 1

Answer:

LIME WATER TURNS MILKY

CaCO3 + 2HCl =› CaCl2 + CO2 + H2O

Explanation:

Marble i.e. calcium carbonate(CaCO3) reacts with dil.HCL to release calcium chloride(CaCl2), carbon dioxide(CO2) and water(H2O).

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The gas which evolves after reaction is carbon dioxide(CO2) which reacts with lime water i.e. calcium hydroxide(Ca(OH)2) and turns it milky*

Co2 + Ca(OH)2 =› CaCO3 + H2O

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(lime water turns milky due to the supension of insoluble calcium carbonate(CaCO3)).

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Hopes it is correct and helps you..:›