Using suitable diagrams, discuss the mutual solubilities of components

Question

Using suitable diagrams, discuss the mutual solubilities of components of the following liquid pairs which have

(a) lower critical solution temperature,

(b) upper critical solution temperature, and

22 Jan 2025

Answer :

Word Count : 397

### (a) Lower Critical Solution Temperature (LCST)

In liquid-liquid phase diagrams showing LCST, there is a temperature below which two liquids are completely miscible in all proportions, but above that temperature, phase separation occurs.

Diagram Explanation:
- The phase diagram typically consists of two axes: temperature (y-axis) and composition (x-axis).
- At low temperatures, the components are miscible in all proportions.
- As the temperature increases, the solubility decreases, and there is a point where phase separation occurs. This is called the LCST.
- The line that marks the LCST separates the miscible and immiscible __________ __________ ________ ____ __________ ______ ___ _______.
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