At 25 degree Celsius, 190 grams of glucose is dissolved in 1000 grams of water. For this solution which of the following is correct ? a. M=m b. M > m c. M < m d. M is independent of m
1 Answer
The correct answer is c.
Explanation:
Calculate the molal concentration of glucose
∴
Calculate the molar concentration of glucose
We need the density of the solution to calculate its volume.
The density will be greater than that of water, say, 1.06 g/mL.
The mass of the solution is (190 + 1000) g = 1190 g. Then
Conclusion: The moles per kilogram of solvent are usually greater than the moles per litre of solution because the solute increases the volume to more than one litre.
Statements a. and b. are incorrect.
The correct statement is c.
As
Option d. is therefore incorrect.