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Ways to Define Concentration

250 ml of a c...

Question

$250 m l$ of a calcium carbonate solution contains $2.5 g r a m s$ of $C a C O_{3}$ . If $10 m l$ of this solution is diluted to one litre, what is the concentration of the resultant solution ?

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Solution

$250 m l$ solution contain $2.5 g m C a C O_{3}$
$10 m l$ solution contain $\frac{2.5}{250} \times 10 C a C O_{3}$
$= 01 g m$
number of mole of $C a C O_{3} = \frac{0.1}{100} = 0.001$
Concentration $= \frac{0.001}{1 l i t r e} = 0.001 m o l / l i t r e$

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