2g) Tests For Ions And Gases

Question 1

Lithium

Answer 1

Crimson red flame

In water fizzes until disappears

Question 2

Sodium

Answer 2

Yellow-Orange Flame

In water fizzes rapidly may burn in an orange flame, may move

Question 3

Potassium

Answer 3

Lilac Flame

In water reacts violently, moves around very quickly, burns with a lilac flame and may explode

Question 4

Magnesium

Answer 4

Bright white flame

Question 5

Calcium

Answer 5

Brick-Red flame

Question 6

Copper

Answer 6

Sodium Hydroxide solution

Blue precipitate

Question 7

2+

Fe

Answer 7

Sodium hydroxide solution

Green precipitate

Question 8

3+

Fe

Answer 8

Sodium Hydroxide solution

Red brown precipitate

Question 9

Ammonium

Answer 9

Sodium Hydroxide solution

Gives off ammonia, turns damp red litmus blue

Question 10

Chlorine

Answer 10

Bleached damp litmus paper

Question 11

Oxygen

Answer 11

Relights glowing splint

Question 12

Carbon dioxide

Answer 12

Turns lime water cloudy

Question 13

Hyrdrogen

Answer 13

Makes a squeaky pop with a lit splint

Question 14

Ammonia

Answer 14

Turns damp red litmus blue

Question 15

Carbonates

Answer 15

Hydrochloric acid

Gives of CO2 - turns lime water cloudy

Question 16

Sulfates

Answer 16

Hydrochloric acid and Barium Chloride

White precipitate - Barium Sulfate insoluble

Question 17

Chloride

Answer 17

Nitric acid and Silver Nitrate

White precipitate -Silver Chloride insoluble

Question 18

Bromine

Answer 18

Nitric acid and Silver Nitrate

Cream precipitate- Silver bromide

Question 19

Iodine

Answer 19

Nitric acid and Silver Nitrate

Yellow precipitate - Silver iodide insoluble