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Standard XII

Chemistry

Hardness of Water and Treatment

Chemical A is...

Question

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 a solution of A, it turns cloudy. What is the chemical formula of A

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Solution

The correct option is C

$C a (O H)_{2}$ removes temporary hardness in Clark’s process.

$C a (O H)_{2}$ + $N a_{2} C O_{3}$ ---> 2NaOH + $C a C O_{3}$
$C a (O H)_{2} + C O_{2}$ ----> $C a C O_{3} + H_{2} O$

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Similar questions

Q. 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

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, it turns cloudy. What is the chemical formula of

(A)

Q. Chemical

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is used for water softening to remove temporary hardness.

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reacts with sodium carbonate to generate caustic soda. When

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is bubbled through a solution of

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, it turns cloudy. What is the chemical formula of

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Q. A chemical

(A)

is used for water softening to remove temporary hardness.

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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

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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?

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’ ?

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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

The correct option is C Ca(OH)2 removes temporary hardness in Clark’s process. Ca(OH)2 + Na2CO3 ---> 2NaOH + CaCO3 Ca(OH)2+CO2----> CaCO3+H2O

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 a solution of A, it turns cloudy. What is the chemical formula of A

The correct option is C

$C a (O H)_{2}$ removes temporary hardness in Clark’s process.

$C a (O H)_{2}$ + $N a_{2} C O_{3}$ ---> 2NaOH + $C a C O_{3}$
$C a (O H)_{2} + C O_{2}$ ----> $C a C O_{3} + H_{2} O$