Flame Tests

Question 1

Lithium ions burn what colour?

Answer 1

Crimson-red

Question 2

Sodium ions burn what colour?

Answer 2

Yellow-Orange

Question 3

Potassium ions burn what colour?

Answer 3

Lilac

Question 4

Calcium ions burn what colour?

Answer 4

Brick-red

Question 5

Copper ions + sodium hydroxide form what precipitate?

Answer 5

Blue

Question 6

Iron(II) ions + sodium hydroxide form what precipitate?

Answer 6

Sludgy green

Question 7

Iron(III) ions + sodium hydroxide form what precipitate?

Answer 7

Reddish Brown

Question 8

Test for ammonia gas?

Answer 8

Damp red litmus paper turns blue

Question 9

Test for ammonium ions?

Answer 9

Add drops of sodium hydroxide. Releases ammonia gas

Question 10

What do you use to test for Carbonates?

Answer 10

(Dilute) HCl. Produces carbon dioxide

Question 11

Test for carbon dioxide?

Answer 11

Turns limewater cloudy

Question 12

Test for sulphate ions?

Answer 12

Add (Dilute) HCl, then barium chloride solution. Produces white precipitate (barium sulphate)

Question 13

Test for Halides?

Answer 13

Add dilute nitric acid, then silver nitrate solution

Question 14

Chloride ions give what precipitate with silver chloride?

Answer 14

White

Question 15

Bromide ions give what precipitate with silver chloride?

Answer 15

Cream

Question 16

Iodide ions give what precipitate with silver chloride?

Answer 16

Yellow

Question 17

Test for chlorine gas?

Answer 17

Turns damp litmus paper red. Then bleaches it white

Question 18

Test for Oxygen?

Answer 18

Relights glowing splint

Question 19

Test for hydrogen?

Answer 19

Lit splint, squeaky pop

Question 20

Chemical test for water?

Answer 20

anhydrous copper sulphate powder white to blue

Question 21

Physical test for pure water?

Answer 21

Boils at 100 degrees C. Freezes at 0 degrees.