Metal hydroxide precipitates

Question 1

Calcium ions

Answer 1

• Add calcium ion solution to sodium hyrdoxide
• Produces a white preciptate
• Use flame test to see which one is calcium

Question 2

Magnesium ions

Answer 2

Add calcium ion solution to sodium hyrdoxide
- Produces a white preciptate

Question 3

Potassium ions

Answer 3

• Add calcium ion solution to sodium hyrdoxide
• Produces a white preciptate
• If we add exess sodium hydroxide solution the aluminum preciptate redisolves to being colourless.

Question 4

Copper (II)

Answer 4

• Copper II ions react with sodium hydroxide to form a blue preciptate of copper (II) hydroxide

Question 5

Iron (II)

Answer 5

• Iron (II) ions react with sodium hydroxide to form a green precipitate of iron (II) hydroxide

Question 6

Iron (III)

Answer 6

Iron (III) reacts with sodium hydroxide to form a brown precipitate of Iron (III) hydroxide