PROPERTIES OF MATERIALS

Question 1

Soluble-

Answer 1

It dissolves in a certain liquid.

Question 2

Insoluble-

Answer 2

It cannot be dissolved in a certain liquid.

Question 3

Concetration-

Answer 3

An amount of something in a certain volume.

Question 4

Saturated solution-

Answer 4

when no more solute can be dissolved.

Question 5

Conservation of mass-

Answer 5

mass of solvent+mass of solute= mass of solution.

Question 6

Solubility-

Answer 6

Measure of how soluble something is.

Question 7

What do all solutions have in common?

Answer 7

They are transparent not colourless.

Question 8

Solute-

Answer 8

A solid substance which dissolves into a solvent.

Question 9

Solvent-

Answer 9

The liquid in which a solute dissolves into to produce a solution.

Question 10

Solution-

Answer 10

The substance which is produced when the solute dissolves into the solvent.

Question 11

Factors affecting solubility-

Answer 11

• Tempreture.
  -If the solution is saturated the excess will collect at the bottom.

Question 12

Pure substance-

Answer 12

A substance which is made from only one atom or compound.

Question 13

Impure Substance-

Answer 13

A substance which contains impurities and other substances.

Question 14

Uses of chromatography-

Answer 14

1. To check the purity of medicine.
2. To detect contaminants in food and drink.
3. To inspet cosmetics.

Question 15

The distance moved by the spot depends on-

Answer 15

1. Attraction to the paper.
   
   • The more attracted the spot
     is to the paper the slower
     and less it moves.
2. Attraction to solvent.
   - The more attracted the spot
   is to the solvent the faster it
   moves.

Question 16

Rf Value-

Answer 16

Distance moved by solvent