When a piece of limestone reacts with dilute HCl, a gas p is produced .when gas p is passed through lime water then a white precipitate Q is formed. On passing excessive of gas p the white precipitate dissolves forming a soluble compounds r
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Gas p=co2(caco3+hcl-cacl2+h2o+co2)
Co2+ca(oh)2-caco3+H20
Therefore,q is calcium carbonate
r-calcium bicarbonate as
Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate:
CO2 + H2O ------> H2CO3
H2CO3 +CaCO3 --------> Ca(HCO3)2
Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water.
I hope it's helpful
Co2+ca(oh)2-caco3+H20
Therefore,q is calcium carbonate
r-calcium bicarbonate as
Bubbling carbon dioxide through the solution for an extended period of time makes the solution become clear and colourless as the carbon dioxide forms acidic carbonic acid when it dissolves in the water, the carbonic acid (H2CO3) reacts further with the calcium carbonate:
CO2 + H2O ------> H2CO3
H2CO3 +CaCO3 --------> Ca(HCO3)2
Ca(HCO3)2 = calcium hydrogen carbonate which is soluble in water.
I hope it's helpful
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