Unit 1

Question 1

Definition of physical changes?

Answer 1

Physical changes involves the forces between the particles of substances, instead of the inter-conversions being chemical changes

Question 2

Solid to Liquid

Answer 2

Melting

Question 3

Liquid to solid

Answer 3

Freezing

Question 4

Liquid to gas

Answer 4

Boiling

Question 5

Gas to liquid

Answer 5

Condensing

Question 6

Solid to gas

Answer 6

Sublimation

Question 7

Gas to solid

Answer 7

Deposition

Question 8

Definition of diffusion?

Answer 8

Diffusion is the movement of particles from high concentration gradient to low concentration gradient.

Question 9

What is dilution?

Answer 9

Is when you add a solvent to a solution

Question 10

What is solvent?

Answer 10

Solvent is a liquid in which a solute dissolves

Question 11

What is a solute?

Answer 11

Solute is a particle that dissolves in a liquid.

Question 12

What is a solution?

Answer 12

Solution is a mixture formed when a solute dissolves in a solvent

Question 13

What is a saturated solution?

Answer 13

is a solution in which no more solvent can dissolve

Question 14

What is solubility?

Answer 14

the mass of solute which must dissolve in 100g of solvent