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There is 25% ammonium sulfate aqueous solution in college physical chemistry examination questions. How to deal with pure ammonium sulfate crystals?
The whole process is considered as a constant pressure process. At present, at room temperature, the state of the solution is located in the cyan area in the figure. Cool to 253-273℃, let stand for a long time, the solution state is in the skin color area in the figure, ice precipitates, and then heat to room temperature. Repeated several times, the liquid will be in A, and the liquid will evaporate and cool to obtain crystals.
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