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Concentration Terms

An aqueous so...

Question

An aqueous solution contains 0.53g of anhydrous ${{N a}_{2} C O}_{3}$ (Mol. wt. 106) dissolved in 100ml of solution. The molarity of the solution is:

0.1 M

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0.05 M

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0.2 M

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0.4 M

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Solution

The correct option is A $0.05 M$
$M o l a r i t y = \frac{Moles of solute}{V (L)}$

$= \frac{W e i g h t}{M . w t} \times \frac{1000}{V (m l)}$

$= \frac{0 \cdot 53}{106} \times \frac{1000}{100}$

$= 0 \cdot 05 M$

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