CHEMICAL ANALYSIS - TESTING FOR POSITIVE IONS [C12.4]

Question 1

COLOURED precipitate

Answer 1

copper (II) / Cu 2+
iron (II) / Fe 2+
iron (III) / Fe 3+

Question 2

WHITE precipitate

Answer 2

calcium (II) / Ca 2+
magnesium (II) / Mg 2+
aluminium (III) / Al 3+

Question 3

copper (II) / Cu 2+ precipitate

Answer 3

blue

Question 4

iron (II) / Fe 2+ precipitate

Answer 4

green

Question 5

iron (III) / Fe 3+ precipitate

Answer 5

brown

Question 6

TEST PROCESS?

Answer 6

1. Add drops of sodium hydroxide
   2 if you form white precipitate and more sodium hydroxide until its in excess