Testing For Ions

Question 1

Lithium ions

Answer 1

Flame test- crimson

Sodium Hydroxide- n/a

Question 2

Sodium ions

Answer 2

Flame test- yellow

Sodium Hydroxide- n/a

Question 3

Potassium ions

Answer 3

Flame test- lilac

Sodium Hydroxide- n/a

Question 4

Copper ions

Answer 4

Flame test- green

Sodium Hydroxide- blue precipitate

Question 5

Calcium ions

Answer 5

Flame test- orange red

Sodium Hydroxide- white precipitate (does not dissolve when more NaOH is added)

Question 6

Magnesium ions

Answer 6

Flame test- n/a

Sodium Hydroxide- white precipitate (does not dissolve when more NaOH is added)

Question 7

Aluminium ions

Answer 7

Flame test- n/a

Sodium Hydroxide- white precipitate (does dissolve when more NaOH is added)

Question 8

Iron (II) ions

Answer 8

Flame test- n/a

Sodium Hydroxide- green precipitate

Question 9

Iron (III) ions

Answer 9

Flame test- n/a

Sodium Hydroxide- brown precipitate

Question 10

Carbonate ions

Answer 10

Add dilute acid and bubbles of gas will be given off that turn limewater cloudy

Question 11

Sulphate ions

Answer 11

Add barium chloride with hydrochloric acid and a white precipitate will form