Name: Solid Solutions
Uploaded: 2019-07-19
Duration: 2 min 56 s
Description: Solutions can be categorized as solid, liquid, and gaseous based on the physical states of solvents and solutes. In this video, let's learn about solid solutions.

Question

Mention the main points of difference between ideal and non-ideal (both showing positive as well as negative deviations) solutions. Give at least two examples of each type.

Accepted Answer

Ideal solutions Non-Ideal solutions

$∆ H_{mix} = 0$ $∆ H_{mix} not equals to 0$

$∆ H_{dilution} = 0 ∆ V_{mix} = 0$ $∆ V_{mixing} not equals to 0$

$A - B$ interactions $= A - A or B - B$ $A - B$ interactions are weaker than $A - A or B - B$ interactions

Non-ideal solution show positive and negative derivations.

positive derivation negative derivation

(i)Total vapour pressue determined experimentally is higher than the calculated from roult's law (i)Total vapour pressure determined experimentally is lower than the calculated from roult's law

(ii) $∆ V_{mixing} = + ve ∆ H_{mixing} = + ve$ $∆ V_{mixing} = - ve ∆ H_{mixing} = - ve$

(iii) $A - B < A - A OR B - B$

carbon disulphide +acetone

(iii) $A - B > A - A or B - B$

acetone+aniline

HCl+water

(iv) Form minimum boiling azeotropes (iv)Form maximum boiling azeotropes

(v) The vapour pressure of solution is higher, the solution exhibits positive deviation (v) The vapour pressure of solution is lower, it exhibits negative deviation from Raoult.

Mention the main points of difference between ideal and non-ideal (both showing positive as well as negative deviations) solutions. Give at least two examples of each type.

Important Questions on Solutions

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