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