Potassium chloride (salt) is added to water and the mixture is stirred until no more salt dissolves. The salt that does not dissolve is allowed to settle out. Refer to the container on the left of the figure.
At this point, is the solution saturated, unsaturated, or supersaturated?
The water is allowed to evaporate until the volume of the solution is half the original volume. The temperature remains constant during this entire time. Nothing special is done to the solution to trick it. Refer to the container on the right of the figure.
At this point, is the solution saturated, unsaturated, or supersaturated?
After evaporation, is the mass of potassium chloride dissolved in solution more than, less than, or the same as the mass of potassium chloride dissolved in solution before evaporation?
(YES, You are seeing more solid on the bottom of the container on the right.)
After evaporation, is the concentration (molarity) of the solution more than, less than, or the same as the concentration of the solution before evaporation?
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