Revision

Question 1

Mixture

Answer 1

A mixture is when two elements are bonded non-chemically

Question 2

Why would we separate mixtures?

Answer 2

To find criminals, get pure water.etc

Question 3

What is the difference between solution and solubility?

Answer 3

A solution is a mixture of a solid and a liquid after it has dissolved. Solubility is how much a medium can dissolve

Question 4

What is filtration?

Answer 4

Filtration is when you have a mixture of a solid and a liquid, you use the filter paper to separate these by poring the mixture through the paper, the paper allows the liquid the pass through, but leaves the solid behind.

Question 5

What is evaporation?

Answer 5

Evaporation is a separating technique in which two liquid are bonded, you heat them and the liquid with a lower melting point evaporates leaving the other liquid.

Question 6

What is distillation ?

Answer 6

Distilation is a separating technique in which two liquid are bonded, you heat them and the liquid with a lower melting point evaporates leaving the other liquid, then this liquid will be condensed by a condenser and drip out the other end pure.

Question 7

What is chromatography?

Answer 7

Chromatography is a separating technique in which you find the true colours in ink. It works by putting a sheet of chromatography paper on a stick, dabbing some ink on it and lowering it into a beaker of water. The water rises up the paper and spreads out the ink and reveals its colours.

Question 8

How do we decide which technique to use?

Answer 8

We can decide which technique to use by seeing the state of matter of the mixture.e.g solid and liquid=filtration