Non-ideal solution and vapour pressure

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Positive or negative deviations in non-ideal solutions arise from the strength of interactions between A-A, B-B, and A-B. Scenarios can exist where A-A interactions are stronger than A-B while B-B interactions are weaker than A-A, leading to complex behavior in vapor pressures. It is possible for the total vapor pressure to resemble that of an ideal solution, even if the individual vapor pressures of components A and B show deviations. Such a solution would not be classified as ideal due to the differing interaction strengths. This discussion highlights the nuanced nature of solution classifications based on molecular interactions.
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When there is a positive or negative deviation it is due to the interactions between A-A and B-B being weaker or stronger than the interactions between A-B. However, are there any scenarios where the interactions between A-A are stronger than A-B while B-B weaker than A-A or vice versa?

In such a case would it be possible that the overall total vapour pressure of the solution to look like an ideal solution but the individual vapour pressure of A and B having positive and negative deviations?
 
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Yes, and yes.
 
Interesting idea, hadn't thought of this question before.
 
Bystander said:
Yes, and yes.
Hmm in such a case what would the solution be classified as? Because it shouldn't be an ideal solution still right?
 

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