Topic 9 - Seperate Chemistry 2

Question 1

Why is the test for any ion unique?

Answer 1

• To get a clear identification

Question 2

Flame colour when burning Lithium:

Answer 2

• Red

Question 3

Flame colour when burning Sodium:

Answer 3

• Yellow

Question 4

Flame colour when burning Potassium:

Answer 4

• Lilac

Question 5

Flame colour when burning Calcium:

Answer 5

• Orange-Red

Question 6

Flame colour when burning Copper:

Answer 6

• Blue-Green

Question 7

Effect of adding NaOH to Aluminium ion (Anion testing):

Answer 7

• White precipitate, dissolves in excess NaOH to form a colourless solution

Question 8

Effect of adding NaOH to Calcium ion (Anion testing):

Answer 8

• Forms white precipitate, insoluble, leaves excess NaOH

Question 9

Effect of adding NaOH to Copper (II) ion (Anion testing):

Answer 9

• Light-blue Precipitate

Question 10

Effect of adding NaOH to Iron (II) ion (Anion testing):

Answer 10

• Green precipitate

Question 11

Effect of adding NaOH to Iron (III) ion (Anion testing):

Answer 11

• Red-brown precipitate

Question 12

Test to identify Ammonia:

Answer 12

• Mix NaOH with NH4, turns into NH3 gas
• Turns damp red litmus paper blue

Question 13

Test to identify Carbonate ions:

Answer 13

• Use dilute