A) 0.75 M and 1 m
B) 0.8 M and 1 m
C) 1 M and 0.8 m
D) 1 M and 0.75 m
E) None of These
Correct Answer: E
Solution :
Molarity \[=\frac{\text{weight}\,\text{of}\,\text{solute}\,\text{ }\!\!\times\!\!\text{ 1000}}{\text{mol}\text{.wt}\text{.of}\,\text{solute}\,\text{ }\!\!\times\!\!\text{ volume}\,\text{of}\,\text{solution}}\] \[=\frac{25\times 1000}{250\times 100}\][\[\because \]density of water \[=1g{{(mL)}^{-1}}\]] \[=1\,M\] \[\text{Molality}\,\text{=}\,\frac{\text{weight}\,\text{of}\,\text{solute}\,\text{ }\!\!\times\!\!\text{ 1000}}{\text{mol}\text{.wt}\text{.of}\,\text{solute}\,\text{ }\!\!\times\!\!\text{ }\,\text{wt}\text{.of}\,\text{solvent}}\] \[=\frac{25\times 1000}{250\times 100}=1m.\]You need to login to perform this action.
You will be redirected in
3 sec