A sample containing 5 g of solute in $10^{6}$ grams of a solution is said to have a concentration of :

10 ppm

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20 ppm

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5 ppm

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none of the above

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Solution

The correct option is D 5 ppm
Mass of solute $= 5 g$

Mass of solution $= 10^{6} g$

Concentration (ppm) $= \frac{m a s s o f s o l u t e}{m a s s o f s o l u t i o n} \times 10^{6}$

$= \frac{5}{10^{6}} \times 10^{6}$

$= 5$ ppm

Option C is correct.

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