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A sample of h...

Question

A sample of hard water is heated in a utensil. A white deposit ofcalcium carbonate is formed. This is due to the presence of:

calcium chloride

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magnesium sulphate

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calcium bicarbonate

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calcium hydroxide

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Solution

The correct option is C calcium bicarbonate
Hard water contains magnesium and calcium bicarbonates.So when it is heated $C a^{2 +}$ ions react with bicarbonate ions to form calcium carbonate
$C a^{2 +} + 2 H C O_{3}^{-} \to C a C O_{3} + H_{2} O + C O_{2}$

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Similar questions

0.02 %

C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O

C a (O H)_{2} + C O_{2} \to C a C O_{3} + H_{2} O

C O_{2}

10.0 g

N a_{2} C O_{3}

1.62 g

10.0 g

N a_{2} C O_{3}

1.62 g

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