A student dropped some marble in dilute hydrochloric acid and a gas is evolved. how will you test this gas.?what happen when excess of gas is passed? write all three equation related to equation.
Answers
Marble is chemically calcium carbonate. When dilute HCl is added to calcium carbonate, it forms calcium chloride, water and carbon dioxide. The chemical equation for the reaction is as follows
CaCO3 + 2HCl → CaCl2 + H2O + CO2
Carbon dioxide gas turns lime water milky due to the formation of calcium carbonate. Following is the chemical equation showing the reaction between lime water and carbon dioxide.
Ca(OH)2 + CO2 → CaCO3 + H2O
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When HCl is added to CaCO3 it gives CaCl2 ,H2O and CO2 .equation is
CaCO3+2HCl---> CaCl2+H2O+CO2
CO2 gas turn lime water milky bcz formation of CaCO3
The following equation is showing reaction btw lime water and carbon dioxide
Ca[OH]2+CO2--->CaCO3+H2O