Evaporate the unsaturated solution until crystals begin to precipitate and stop heating. The resulting solution is As above. Saturated solution or unsaturated solution? Why? Evaporate the unsaturated solution until crystals begin to precipitate and stop heating. The resulting solution is As above. Saturated solution or unsaturated solution? Why? Why?

Evaporate the unsaturated solution until crystals begin to precipitate and stop heating. The resulting solution is As above. Saturated solution or unsaturated solution? Why? Evaporate the unsaturated solution until crystals begin to precipitate and stop heating. The resulting solution is As above. Saturated solution or unsaturated solution? Why? Why?

A saturated solution
It is a saturated solution when there is crystal, because it can not dissolve any more solutes.

A saturated solution
A saturated solution begins to precipitate from the presence of crystals, because no more solute can be dissolved in the solution.

What is the difference between evaporative concentration, cooling crystallization and evaporative crystallization, and hot filtration? What state of substance is obtained during the operation of both processes, such as why the compound with crystal water is obtained, and whether there is residual solvent What is the difference between evaporative concentration, cooling crystallization and evaporative crystallization, and hot filtration? What state of substance is obtained during the operation of the two processes, such as why the compound with crystal water is obtained, and whether there is residual solvent, etc.

Evaporative crystallization is to heat the aqueous solution and almost evaporate it dry, and the solute in it precipitates. Generally, this substance shall be stable, and can not be decomposed by heating, nor can it contain crystal water. If it is too heated, the crystal water will also be lost, so the typical evaporative crystallization is NaCl. Cooling crystallization, or cooling crystallization, is generally...