Chemical A is used for water softening to remove temporary hardness. A – InterviewSolution

1.	Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. When CO_2 is bubbled through A, it turns cloudy. What is the chemical formula of A ?
Answer» `CaCO_3` CaO `Ca(OH)_2` `Ca(HCO_3)_2` ANSWER :C

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