Seeking an explanation for the azeotrope mechanism
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The azeotrope mechanism is not very clear. Take hydrochloric acid as an example: its azeotropic concentration is 20%, and the azeotrope temperature is 108 degrees. For example, when using 30% hydrochloric acid as the raw material and 5% hydrochloric acid as the raw material for evaporation, what should be the concentration of the product obtained through this process, and what is the mechanism behind it?
This should be pretty simple, right? I believe that when 5% hydrochloric acid is heated, the vapor produced initially contains water, resulting in a very dilute acid mist with a concentration of less than 5% hydrochloric acid; as evaporation continues and the concentration inside the evaporator rises to 20%, the vapor produced thereafter consists of 20% hydrochloric acid. With 30% hydrochloric acid, what is vaporized at first is hydrochloric acid with a concentration higher than 30%; as evaporation proceeds and the concentration of hydrochloric acid in the evaporator drops to 20%, what is vaporized thereafter is all 20% hydrochloric acid. First of all, is that the case? Explain the mechanism again
Should it be explained from the perspective of saturated vapor pressure?