Tests

Question 1

Sodium hydroxide in aluminium

Answer 1

White precipitate, dissolves in excess forming a colourless solution

Question 2

Sodium hydroxide in ammonium

Answer 2

Ammonia gas given of on warming, turns damp litmus paper blue

Question 3

Sodium hydroxide in calcium

Answer 3

White precipitate, insoluble in excess

Question 4

Sodium hydroxide in copper

Answer 4

Light blue precipitate, insoluble in excess

Question 5

Sodium hydroxide in iron 2+

Answer 5

Green precipitate, insoluble in excess

Question 6

Sodium hydroxide in iron 3+

Answer 6

Brown precipitate, insoluble in excess

Question 7

Sodium hydroxide in zinc

Answer 7

White precipitate, dissolves in excess forming a colourless solution

Question 8

Aqueous ammonia in aluminium

Answer 8

White precipitate, insoluble in excess

Question 9

Aqueous ammonia in ammonium

Answer 9

none

Question 10

Aqueous ammonia in calcium

Answer 10

No precipitate or very faint white precipitate

Question 11

Aqueous ammonia in copper

Answer 11

light blue precipitate, dissolves in excess to give a deep blue solution

Question 12

Aqueous ammonia in iron 2+

Answer 12

Green precipitate, insoluble in excess

Question 13

Aqueous ammonia in iron 3+

Answer 13

Brown precipitate, insoluble in excess

Question 14

Aqueous ammonia in zinc

Answer 14

White precipitate, dissolves in excess forming a colourless solution

Question 15

Test for carbonate

Answer 15

add dilute hydrochloric acid

Question 16

Result for carbonate

Answer 16

Effervescence, carbon dioxide is given off, limewater goes milky

Question 17

Test for chloride

Answer 17

Add excess dilute nitric acid and then aqueous silver nitrate

Question 18

Test for iodide

Answer 18

Add excess dilute nitric acid and then aqueous silver nitrate

Question 19

Test for nitrate

Answer 19

Warm with aqueous sodium hydroxide and aluminium foil

Question 20

Result for chloride

Answer 20

White precipitate

Question 21

Result for iodide

Answer 21

Yellow precipitate

Question 22

Result for nitrate

Answer 22

Ammonia given off, pungent smell, turns red litmus paper blue

Question 23

Test for sulphate

Answer 23

Add excess hydrochloric acid and barium sulphate

Question 24

result for sulphate

Answer 24

White precipitate

Question 25

test for ammonia

Answer 25

Turns damp red litmus paper blue

Question 26

Test for carbon dioxide

Answer 26

Turns limewater milky

Question 27

Test for chlorine

Answer 27

Bleaches damp litmus paper

Question 28

Test for hydrogen

Answer 28

Gives a pop sound in an ignited splint

Question 29

Test for oxygen

Answer 29

Relights a glowing splint

Question 30

Flame test for lithium

Answer 30

Crimson

Question 31

Flame test for sodium

Answer 31

Yellow

Question 32

Flame test for ptassium

Answer 32

Lilac

Question 33

Flame test for calcium

Answer 33

Orange red

Question 34

Flame test for copper

Answer 34

green