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

(1 point)
• Pass the solution through a filter to let the dissolved substance separate.
• Boil the water away, leaving the substance behind in the beaker.
Pour the liquid along a rough surface that would catch the solid particles but not the water.
• Use a magnet to draw out the solid substance from the water.

Answer 1

To separate a solid substance that has dissolved in water, you would use the method of boiling the water away, leaving the substance behind in the beaker. Therefore, the correct option is:

• Boil the water away, leaving the substance behind in the beaker.

This method works because when you boil the water, it evaporates, and any solid dissolved in it will be left in the beaker. The other options either won't work or are not appropriate for separating a dissolved solid.