Testing cations and anoions

Question 1

What colour precipitate does an iron (II) create

Answer 1

Green

Question 2

What colour precipitate does a copper (II) cation create

Answer 2

Blue-green

Question 3

What colour precipitate does an iron (III) cation create

Answer 3

Brown

Question 4

What colour flame does a sodium cation create

Answer 4

Yellow

Question 5

What colour flame does a Calcium cation create

Answer 5

Orange-red

Question 6

What colour precipitate does an Aluminium cation create

Answer 6

White

Question 7

How to distinguish between calcium and aluminium

Answer 7

Add sodium hydroxide and the aluminium will turn colourless

Question 8

How to test for an ammonium ion

Answer 8

Put ammonia in a test tube and heat it over a bunson burner and place a piece of damp red litmus paper and it will turn blue in the presence of ammonia

Question 9

Test for carbonate

Answer 9

Add acid then put into limewater and it will fizz and turn the limewater cloudy

Question 10

Test for sulphate

Answer 10

Add HCL and Barium chloride and a white precipitate will form

Question 11

Test for halide (halogens group 7)

Answer 11

Add nitric acid and silver nitrate and for Cl-white precipitate Br-Cream precipitate Iodine-yellow precipitate

Question 12

Lithium flame colour

Answer 12

Red

Question 13

Calcium flame colour

Answer 13

Orange-red

Question 14

Copper flame colour

Answer 14

Blue green

Question 15

Flame colour for potassium

Answer 15

Lilac

Question 16

Flame colour for sodium

Answer 16

Yellow