Mixtures and solution

Front

What is a mixture?

Back

A mixture is a combination of two or more substances in which no new substances are formed.

Front

What is a solution?

Back

A solution is a type of mixture in which the particles are extremely small and evenly distributed.

Front

What happens to large particles of rock mixed in water?

Back

If large particles of rock mixed in water are large enough, they will settle out as sediment.

Front

Is the town water supply safe to drink if it has 0.02 mg/L of arsenic?

Back

No, the town supply is unsafe to drink as it exceeds the safe level of 0.007 mg/L.

Front

What happens to suspensions if left to stand?

Back

Suspensions separate into their components if left to stand.

Front

What is a colloid?

Back

A colloid is a mixture where very small particles are dispersed throughout a substance but do not settle out.

Front

What is sediment?

Back

Sediment refers to the solid particles that settle out of a liquid mixture.

Front

What is the difference between a solution and a suspension?

Back

In a solution, the particles are so small that they do not settle out, while in a suspension, larger particles can settle out over time.

Front

What is an example of a colloid?

Back

Milk is an example of a colloid, as it contains tiny fat globules dispersed in water.

Front

What is the safe level of arsenic in drinking water?

Back

The official safe level of arsenic in drinking water is 0.007 mg/L.