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The density of a 10.0% by mass KCl solution in water is $1.06gcm^{-3}$,its molarity is

$\begin{array}{1 1}1.489M\\1.420M\\1.420molKg^{-1}\\1.489molkg^{-1}\end{array} $

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Answer : $1.420M$
$M=\large\frac{(10g/74.5gmol^{-1})}{100g/1.06gcm6{-3})}$$=1.42\times 10^{-3}molcm^{-3}$
$\Rightarrow 1.42moldm^{-3}$
answered Jul 22, 2014 by sreemathi.v
 

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