What is the order of freezing point of aqueous solution if same mole of acetic acid, trichloroacetic acid and trifluoroacetic acid are added in given amount of water?

A c e t i c a c i d < T r i c h l o r o a c e t i c a c i d < T r i f l u o r o a c e t i c a c i d

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

T r i f l u o r o a c e t i c a c i d > A c e t i c a c i d > T r i c h l o r o a c e t i c a c i d

No worries! We‘ve got your back. Try BYJU‘S free classes today!

T r i c h l o r o a c e t i c a c i d > T r i f l u o r o a c e t i c a c i d > A c e t i c a c i d

No worries! We‘ve got your back. Try BYJU‘S free classes today!

A c e t i c a c i d > T r i c h l o r o a c e t i c a c i d > T r i f l u o r o a c e t i c a c i d

No worries! We‘ve got your back. Try BYJU‘S free classes today!

Open in App

Solution

The correct option is A $A c e t i c a c i d < T r i c h l o r o a c e t i c a c i d < T r i f l u o r o a c e t i c a c i d$
The freezing point of water for the same amount of given compounds can be explained on the basis of the degree of ionization, which depends upon the strength of the acid.

Trifluoroacetic acid is more acidic than trichloroacetic acid which is furthermore acidic than acetic acid.

Therefore the degree of ionization of these acids will decrease in the following order:

Trifluoroacetic acid > trichloroacetic acid > acetic acid

Now greater the degree of ionization, greater will be the depression of freezing point.

Hence, option A is correct.

Suggest Corrections

Similar questions

Q. What is the order of depression in freezing point of aqueous solution if same amount of acetic acid, trichloroacetic and trifluoroacetic acid are added in given amount of water?

Q. The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.

Q. (i) The depression in freezing point of water observed for the same molar concentration of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order as stated above. Explain.
(ii) Calculate the depression in freezing point of water when 20.0 g of

C H_{3} C H_{2} C H C l C O O H

is added to 500g of water.

The depression in freezing point of water observed for the same amount of acetic acid, trichloroacetic acid and trifluoroacetic acid increases in the order given above. Explain briefly.

A 1.00 molal aqueous solution of trichloroacetic acid $(C C l_{3} C O O H)$ is heated to its boiling point. The solution has the boiling point of ${100.8}^{o} C$ . Determine the van 't Hoff factor for trichloroacetic acid. $(K_{b}$ for water 0.512 K kg $M o l^{- 1}$ )

Define the following terms:

(i) Mole fraction

(ii) Isotonic solutions

(iii) Van 't Hoff factor

(iv) Ideal solution

Join BYJU'S Learning Program