Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO2 is bubbled through a solution of A, it turns cloudy. What is the chemical formula of A
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a
CaCO3
b
CaO
c
CaOH2
d
CaHCO32
answer is C.
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Detailed Solution
CaOH2 is used for the softening of temporary hard water.CaOH2aq + CO2 g → CaCO3scloudiness + H2Ol