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Concentration of Solution

1 kg of mud w...

Question

1 kg of mud water sample contains 0.2 g of arsenic. The concentration of arsenide ions in terms of ppm is
200

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Solution

The correct option is A 200
Given weight of solute = 0.2 g
1 kg of mud water (solution) in grams = 1000 g
$C o n c e n t r a t i o n i n p p m = \frac{weight of arsenide ion (g)}{total weight of mud water (g)} \times 10^{6}$
Concentration of arsenide ion in ppm $= \frac{0.2}{1000} \times 10^{6} = 200$ ppm

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