Question

answer this Question.... please​

Answer 1

Van't Hoff Factor :

Van't Hoff has introduced a factor known as " van't Hoff Factor". It is denoted by "i" to predict the nature of a particular solute in the solution.

When the solute dissolves ideally in the solution without undergoing any dissociation or association.

$\boxed{\mathsf{i\:=\:{\dfrac{Observed \:colligative\:property} {Normal\:colligative \:property}}}}$

In terms of molar Mass,

i = $\mathsf{\dfrac{Normal \:molar\:mass} {Observed\:molar \:mass}}$

Four Colligative Properties :

1. RLVP : Relative Lowering of Vapour Pressure.

$\boxed{\mathsf{\dfrac{{P} ^{\circ}\:-\:P_s} {{{P} ^{\circ}} _A}\:=\:i{\chi{_B}}}}$

2. Elevation of Boiling Point :

$\boxed{\mathsf{\Delta{T_b} \:=\:iK_b\:m}}$

where $\mathsf{\Delta{T_b}\:=\:{T_b} ^{s} \:-\: {T_b} ^{\circ}}$

3. Depression of Freezing Point :

$\boxed{\mathsf{\Delta{T_f} \:=\:iK_f\:m}}$

where $\mathsf{\Delta{T_f}\:=\:{T_f} ^{\circ} \:-\: {T_f} ^{s}}$

4. Osmotic Pressure :

$\boxed{\mathsf{\pi{\:=\:iCRT}}}$