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1000 mL of aqueous solutions of $CaCO_3$ contains 1 gm of carbonate,concentration of the solution is

$\begin{array}{1 1}(a)\;10ppm\\(b)\;100ppm\\(c)\;1000ppm\\(d)\;10000ppm\end{array}$

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Answer: 1000 ppm
Mass by volume percentage and parts per million are both and expression of concentration of a solution.
We are given Volume $= 1000\;mL$ and Mass $ = 1\;mg$.
$\Rightarrow ppm = \large\frac{\text{Mass}}{\text{volume}}$$ = \large\frac{1\; gm}{1000\; mL}$$ = \large\frac{1000 \; mg}{1\;L}$$ = 1000 \; ppm$
answered Feb 14, 2014 by sreemathi.v
edited Jul 15, 2014 by balaji.thirumalai

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