States Of Matter And Elements, Compounds, Mixtures (mocks)

Question 1

Define a saturated solution

Answer 1

A solution into which no more solute can be dissolved (into the solvent)

Question 2

How are changes of state achieved?

Answer 2

Particles gain energy when heated, so the forces (of attraction) between the particles are overcome

Question 3

Describe the movement of particles in a liquid

Answer 3

Particles move around each other

Question 4

How do you calculate the Rf value from a chromatogram?

Answer 4

Distance of dye from baseline / distance of solvent from baseline.

Question 5

Define a mixture

Answer 5

An impure substance made from different elements or compounds mixed together that are not chemically joined.

Question 6

What is the purpose of crystallisation

Answer 6

To obtain a salt which contains water of crystallisation from a salt solution.

Question 7

What is the purpose of a paper chromatography

Answer 7

To separate parts of mixtures into their components.

Question 8

define an element

Answer 8

a pure substance listed in the periodic table that only has one type of atom in it

Question 9

define a compound

Answer 9

a substance made from more than one type of element chemically bonded together.