A) \[NaHC{{O}_{3}}\]
B) \[Ca{{(OH)}_{2}}\]
C) \[Ca{{(HC{{O}_{3}})}_{2}}\]
D) \[N{{a}_{2}}C{{O}_{3}}\]
Correct Answer: B
Solution :
: Clarks process is a commercial method of water softening. A calculated amount of quick lime is added to hard water, bicarbonates are converted into insoluble calcium and magnesium carbonates which are filtered off. \[CaO+{{H}_{2}}O\xrightarrow{{}}Ca{{(OH)}_{2}}\] \[Ca{{(HC{{O}_{3}})}_{2}}+Ca{{(OH)}_{2}}\xrightarrow{{}}2CaC{{O}_{3}}\downarrow 2{{H}_{2}}O\]
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