Chemistry

Question 1

Solubility

Answer 1

Is the measure of how much solute can dissolve in a solvent

When no more solute can dissolve in a solvent the solution becomes saturated

The amount of solute that can dissolve changes with temperature

Question 2

Solute

Answer 2

Is the substance that dissolves in the solvent

Question 3

Solution

Answer 3

Is the solvent and the solute mixed together

Question 4

Solvent

Answer 4

Is the substance that the solute dissolves into

Question 5

Soluble

Answer 5

Can be dissolved

Question 6

Insoluble

Answer 6

Can’t be dissolved

Question 7

A pure substance

Answer 7

It is not mixed with anything else and only contains one type of particle. In chromatography if the substance is pure the ink will not separate.

Question 8

What ink travels the fastest in chromatography?

Answer 8

The more soluble the ink is in the solvent the faster think will travel leaving the most insoluble solute in the solvent at the bottom of the paper

Question 9

Paper chromatography

Answer 9

Is a technique that can separate a substance into its components to see if it is pure or not

Question 10

Why does it happen

Chromatography

Answer 10

The water is drawn up by capillary action

Question 11

Capillary action

Answer 11

Sticky attractive force between water molecules and the paper

Question 12

What happens when the water reaches the ink spots?

Answer 12

The ink spots dissolve into the water and the ink is carried up the paper with the water

Question 13

Why do the colours come out

Answer 13

Because some of the colours are more soluble in the water than others and some colours are left behind which separates the different substances in the ink

Question 14

If the ink move in the water, is it always pure?

Answer 14

No if the ink doesn’t dissolve in water it is probably only insoluble in water but it may dissolve in other chemicals

Question 15

What is the substance called that is left behind after filtration occurs

Answer 15

Residue

Question 16

Filtration

Answer 16

Method used to separate insoluble solids and liquids

Question 17

Evaporation

Answer 17

Method used to separate a soluble solid from a liquid

Question 18

Simple distillation

Answer 18

Method used to separate a solution
Salty water is a example of
How to use this method
Salt and water have two different
Boiling points so when you heat the
Solution the substance (in this case water)
With the lowest boiling point’s particles
Would evaporate first leaving the salt particles
Behind

Question 19

Fractional distillation

Answer 19

Is the method used to separate two liquids for example ethanol and water
Ethanol has a lower boiling point than
Water so it evaporates first leaving the water particles behind

Question 20

Chromatography.

Answer 20

Is the method of separating dissolved substances from one or other
For example
Pen
Plant dyes
Or food colouring 
Can be used in this process