Adding Sodium Hydroxide

Question 1

Calcium (2+)

Answer 1

White precipitate

Question 2

Copper (2+)

Answer 2

Blue precipitate

Question 3

Iron (2+)

Answer 3

Green precipitate

Question 4

Iron (3+)

Answer 4

Brown precipitate

Question 5

Aluminium (3+)

Answer 5

White precipitate that redissolves in excess sodium hydroxide

Question 6

Magnesium (2+)

Answer 6

White precipitate