Question

On mixing 10 ml of ethanol with 10 ml of benzene
the total volume of the solution is
(1) > 20 ml (2) < 20 ml
(3) = 20 ml
(4) Can't be predicted​

Answer 1

Answer:

It shows that solution is non ideal showing negative deviation in which force of attraction increases and volume decreases.

No changes in inter particle forces as both are non-polar.

so option 2 is correct.

= 20 ml

Answer 2

On mixing 10 ml of ethanol with 10 ml of benzene the total volume of the solution will be greater than 20 ml.

• The interparticle forces involved in the ethanol and benzene are hydrogen bonding and london dispersion forces respectively.
• When the two liquids are mixed the benzene molecules will obstruct the hydrogen bonding between the ethanol molecules and hence the attractive force is lesser.
• Therefore the mixture of the two will occupy more volume than the sum of their individual volumes.