Solutions, Colloids, and Suspensions

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What is a colloid?

Back

A colloid is a type of mixture where tiny particles are dispersed throughout another substance and do not settle out over time. Examples include milk and fog.

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What is a heterogeneous mixture?

Back

A heterogeneous mixture is a mixture in which the composition is not uniform throughout. The different components can often be seen and separated.

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What is a homogeneous mixture?

Back

A homogeneous mixture is a mixture in which the composition is uniform throughout. The different components are not easily distinguishable.

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What is a solution?

Back

A solution is a homogeneous mixture where one substance (the solute) is completely dissolved in another (the solvent). An example is saltwater.

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What is a suspension?

Back

A suspension is a heterogeneous mixture in which solid particles are suspended in a liquid or gas and can settle out over time. An example is Italian dressing.

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What is an example of a colloid?

Back

Milk is an example of a colloid, where fat particles are dispersed in water.

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What is an example of a heterogeneous mixture?

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Cereal in milk is an example of a heterogeneous mixture, as the components can be seen and separated.

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What is an example of a homogeneous mixture?

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Air is an example of a homogeneous mixture, as it has a uniform composition throughout.

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How do colloids differ from solutions?

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Colloids have larger particles that do not settle out, while solutions have particles that are completely dissolved and cannot be seen.

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What happens to the particles in a suspension over time?

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In a suspension, the solid particles will eventually settle to the bottom if left undisturbed.