Solutions Question 255
Question: Which of the given aqueous solution has the maximum boiling poin’ $ (K_{b},of,H_2O)=0.52{}^\circ ,mo{l^{-1}}kg),,T_{b}(H_2O)=373K) $
Options:
A) 6% urea solution by weight of solution
B) 18% glucose solution by weight of solution
C) 34.2% sucrose solution by weight of solution
D) All have equal boiling points
Show Answer
Answer:
Correct Answer: C
Solution:
$ \Delta T_{b}=\frac{1000K_{b}w_1}{m_1w_2} $ Boiling point of solution $ =(373+\Delta T_{b}) $ The larger the value of $ \Delta T_{b} $ , the higher the boiling point. $ w_1 $
$ w_2 $
$ m_1 $
| $ \Delta T_{b} $ | Boiling point |
|---|---|
| (1) 6.0g 94.0g | 60 0.55 373.55K |
| (2)18g 82g 180 | 0.63 373.63K |
| (3) 34.2g 65.8g | 342 0.79 373.79K |
