Question

In which of the aqueous solution the van't hoff factor (i) is maximum? (1) 1.2 m ch,cooh (2) 0.001 m ch,cooh (3) 0.1 m urea (4) 1.2 m glucose

Answer 1

Answer:

The maximum Van't Hoff factor will be higher of acetic acid solution ($CH_{3}COOH$).

Explanation:

Van't Hoff factor is related to the effect of the solute on the colligative property of a solution (the property which depends upon number of solute particles).

If a solute dissociate in a solution, the effective number of molecules increases. Thus more the number of ions generated by a solution on dissociation, higher the Van't Hoff factor.

If a solute associate in a solution, the effective number of molecules decrease. Thus more the association lesser the Van't Hoff factor.

The given solutions are : acetic acid and glucose.

Acetic acid dissociates into ion thus even if we have concentration of glucose and acetic acid, same the Van't hoff factor of acetic acid will be more.

Van't Hoff factor of acetic acid will be two

Van't Hoff factor of glucose will be one.

Thus, the Van't Hoff factor of acetic acid (1.2m) will be more than glucose(1.2m).

In case of 0.001 m of acetic acid the concentration of acetic acid is lesser than (1.2m) solution of acetic acid, hence the colligative property will be lesser for it however, the Van't Hoff factor will be the same.

The maximum Van't Hoff factor will be higher of acetic acid solution ($CH_{3}COOH$).

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Van't Hoff factor of acetic acid

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