Question

What is the percent by mass of sugar solution prepared by dissolving 12 grams of sucrose(table sugar)in84 grams of solution​

Answer 1

Answer:

DepressioninFreezingpointΔT

f = M 1 ×W 2

W 1 ×K f ×1000

where W 1 =Weight of Solute

W 2 =Weight of solvent

M 1 =Molar mass of solute

K f =Freezing point deprssion constant

Now,ΔT f= 342×1000

1.86×68.5×1000

=0.372C

Now,ΔT f =T o −T f

So,T f =0−0.372=−0.372C.

(Freezing point of purewater=0

0

C.)

Hence, the correct option is A

Answered By : Tanisha