C8

Question 1

What is the common name for calcium hydroxide dissolved in water?

Answer 1

limewater

Question 2

what is a pure substance?

Answer 2

substance that is only a single element or compound

Question 3

how do you know if a substance is pure?

Answer 3

a pure substance melts/ boils at a specific fixed temperature

Question 4

impure substances melt/ boil …

Answer 4

over a range of temperatures

Question 5

what is formulation?

Answer 5

a complex mixture that has been designed as a useful product

Question 6

what are examples of formulations?

Answer 6

fuels
cleaning products
paints
medicines
alloys fertiliser
food

Question 7

what is a chromatogram?

Answer 7

the results of chromatography analysis

Question 8

what is the stationary phase in chromatography?

Answer 8

the paper

Question 9

what is the mobile phase in chromatography?

Answer 9

solvent

Question 10

is steel an element compound or mixture?

Answer 10

mixture

Question 11

is air an element compound or mixture

Answer 11

mixture

Question 12

what colour are sodium compounds?

Answer 12

white

Question 13

What one 3 examples of formulations

Answer 13

Paints
Fertilisers
Drugs

Question 14

what are 3 examples of pure substances.

Answer 14

1. glucose
2. urea
3. sucrose

Question 15

what are the 3 examples of mixtures

Answer 15

1. urine
2. blood
3. saliva