Question

What are ideal & non ideal Solution? Explain the deviation from Rault's law.

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Answer 1

The solutions which do not obey Raoult's law over the entire range of concentration are called non-ideal solutions. Therefore, for such solutions. pA ≠ pA° xA. pB ≠ pB° xB. The vapour pressure of such solutions is either higher or lower than that predicted by Raoult's law.

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Answer 2

☆Positive Deviation from Raoults Law☆

For example, consider two components A and B to from non- ideal solutions. ... These liquids will show positive deviation when Raoult's Law when: PA> P A 0 × A and P B >P0 B × B, as the total vapour pressure ( P A 0 × A + P0 B × B) is greater than what it should be according to Raoult's Law.

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