Question

In: Chemistry

A mixture is prepared that has 0.5276 g of solute in 9.9022g of cyclohexane. The freezing...

A mixture is prepared that has 0.5276 g of solute in 9.9022g of cyclohexane. The freezing point temperature change is found to be 5.4 degree C. The percent composition of the solute is: 93.7% C, and 6.30% H.

a. find the empirical formula of the solute.

b. find the empirical mass of the solute.

c. find the molar mass of the solute.

d. find the molecular formula of the solute.

Expert Solution

C H

93.7 6.3

93.7/12 6.3/1

7.8 6.3

7.8/6.3 6.3/6.3

1.25 1

1.25 x 4 1x 4

5 4

a) empirical formula of the solute = C5H4

b) empirical mass of the solute = 5 x 12 + 4

=64 g

c) solution :

deltaTf = Kf x w1/m1*1000/w2

w1- wt of solute= 0.5276 g

m1-molar mass of solute = ?? g/mol

w2 - weight of solvant= 9.9022g

Kf = 20

queen_honey_blossom answered 1 week ago

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