The difference between a solution and a suspension is in the particle sizes involved.
A solution is a mixture of ions or molecules (very, very small). Solutions are transparent, meaning that you can see through them. A suspension has bigger particle sizes and so it may look cloudy or murky.
Here is a test you can do at home to see whether something is a solution or a suspension. After you make your mixture, let the container sit for a few days. If any of the particles settle to the bottom of the container, it is a suspension (a good example of a suspension to try is mud and water). If none of the particles settle to the bottom, it is a solution (a good example of a solution to try is salt and water).
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