Answered

What volume, in Liters, of a 2.00 M KCl solution contains 2.5kg of KCl? Molar mass of KCl= 74.55g/mole



Answer :

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[tex]C_{m}=\frac{n}{V_{r}}\\\\ n=\frac{m_{s}}{M}\\\\ C_{m}=\frac{m_{s}}{MV_{r}} \ \ \ |*MV_{r}\\\\ C_{m}MV_{r}=m_{s} \ \ \ |:C_{m}M\\\\ V_{r}=\frac{m_{s}}{C_{m}M}\\\\\\ m=2.5kg=2500g\\ M=74.55\frac{g}{mol}\\ C_{m}=2\frac{mol}{L}\\\\ V_{r}=\frac{2500g}{2\frac{mol}{L}*74.55\frac{g}{mol}}\approx16.77L[/tex]