Question

Separating Mixtures Quick Check
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Question
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?(1 point)
Responses

Pass the solution through a filter to let the dissolved substance separate.
Pass the solution through a filter to let the dissolved substance separate.

Boil the water away, leaving the substance behind in the beaker.
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.
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.
Use a magnet to draw out the solid substance from the water.
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Answer 1

In this scenario, the most effective method to separate a solid substance that has dissolved in water is to **boil the water away, leaving the substance behind in the beaker**. This method is effective because when water evaporates, it leaves the solid substance behind, effectively separating it from the liquid.

The other options provided do not effectively separate a dissolved substance from water:

- **Filtration** is not applicable for dissolved substances, as they pass through the filter paper along with the water.
- **Pouring the liquid along a rough surface** would not effectively separate dissolved solids.
- **Using a magnet** would only be useful if the solid is magnetic, and it wouldn't work for most dissolved substances.

Thus, the best answer is to boil the water away.