Chemical ‘A’ is used for water softening to remove temporary hardness. ‘A’ reacts with sodium carbonate to generate caustic soda. When carbon dioxide is bubbled through ‘A’, it turns cloudy. What is the chemical formula of ‘A’ ?

Q. Chemical A is used for water softening to remove temporary hardness, A reacts with

N a_{2} C O_{3}

to generate caustic soda. When

C O_{2}

is bubbled through A, it turns cloudy. What is the chemical formula of A?

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A 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 the solution of (A), it turns cloudy. What is the chemical formula of (A)?

The correct option is C Ca(OH)2Lime water (Ca(OH)2) is used to remove the temporary hardness of water. Ca(OH)2 reacts with bicarbonates of Ca and Mg to form insoluble carbonates. Ca(HCO3)2(aq)+Ca(OH)2→2CaCO3(insoluble)↓+2H2O Mg(HCO3)2(aq)+Ca(OH)2→CaCO3(insoluble)↓+MgCO3(insoluble)↓+2H2O

A chemical $(A)$ is used for water softening to remove temporary hardness. $(A)$ reacts with sodium carbonate to generate caustic soda. When $C O_{2}$ is bubbled through the solution of $(A)$ , it turns cloudy. What is the chemical formula of $(A)$ ?