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Limiting Reagent or Reactant

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Question

A solution of $C a C l_{2}$ is 0.5 mol/litre; then the moles of chloride ion in 500 mL will be:

A

0.5

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B

0.25

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C

1

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D

0.75

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Solution

The correct option is A 0.5
A solution of $C a C l_{2}$ is $0.5$ mol/litre.

Hence, 1 litre of solution will contain 0.5 moles of $C a C l_{2}$ .

$0.500$ litres of solution will contain $0.500 L \times 0.5 m o l / l i t r e = 0.25$ moles of $C a C l_{2}$

1 mole of $C a C l_{2} = 2$ moles of chloride ions.

0.25 moles of $C a C l_{2} = 2 \times 0.25 = 0.50$ moles of chloride ions.

Hence, option $A$ is correct.

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