SATHEE: Solutions Question 255

Solutions Question 255

Question: Which of the given aqueous solution has the maximum boiling poin’ $(K_{b}, o f, H_{2} O) = 0.52^{\circ}, m o l^{- 1} k g),, T_{b} (H_{2} O) = 373 K)$

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:

$Δ T_{b} = \frac{1000 K_{b} w_{1}}{m_{1} w_{2}}$ Boiling point of solution $= (373 + Δ T_{b})$ The larger the value of $Δ T_{b}$ , the higher the boiling point. $w_{1}$

$w_{2}$

$m_{1}$

$Δ T_{b}$	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

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Solutions Question 255

Question: Which of the given aqueous solution has the maximum boiling poin’ (Kb,of,H2O)=0.52∘,mol−1kg),,Tb(H2O)=373K)

Options:

Answer:

Solution:

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Question: Which of the given aqueous solution has the maximum boiling poin’ $(K_{b}, o f, H_{2} O) = 0.52^{\circ}, m o l^{- 1} k g),, T_{b} (H_{2} O) = 373 K)$