You are worried that a solid substance has dissolved in a beaker of water in a lab.What would be a way to separate the substance from the water?

Question

A.boil the water away leaving the substance behind in the beaker
B.pour the liquid along a rough surface that would catch the solid particles but not the water
C.use a magnet to draw out the solid substance from a the water
D.pass the solution through a filter to let the dissolved substance separate

Answer 1

The correct way to separate a solid substance that has dissolved in water is:

A. boil the water away leaving the substance behind in the beaker.

Dissolved solids in water form a solution, and boiling the water will evaporate the water, leaving the solid substance behind.

Options B, C, and D are either not applicable (as C would typically work for magnetic solids, and D is not effective for dissolved solids) or just not practical for separating a dissolved substance from water.