Chemical A is used for water softening to remove temporary hardness. A reacts with sodium carbonate to generate caustic soda. Wh

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 solution of A, it turns cloudy. What is the chemical formula of A ?
A. `CaCO_(3)`
B. `CaO`
C. `Ca(OH)_(2)`
D. `Ca(HCO_(3))_(2)`

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

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