RP11: Carrying out test tube reactions to identify transition metal ions in solution

What is the overall method for this experiment? (5)

What are the three reagents used to test metal-aqua ions in solution? (3)

- Sodium hydroxide solution

- Ammonia solution

- Sodium carbonate solution

What is the reaction of [Cu(H2O)6]2+ with sodium hydroxide? (1)

Forms a blue precipitate of [Cu(H2O)4(OH)2]

What happens when excess sodium hydroxide is added to [Cu(H2O)6]2+? (1)

No visible change

What happens when ammonia is added to [Cu(H2O)6]2+? (1)

No visible change

What is the effect of excess ammonia on [Cu(H2O)6]2+? (1)

A deep blue solution of [Cu(H2O)2(NH3)4]2+ is formed

What happens when sodium carbonate solution is added to [Cu(H2O)6]2+? (1)

A green-blue precipitate of CuCO3 forms

What is the reaction of [Fe(H2O)6]2+ with sodium hydroxide? (1)

Forms a green precipitate of [Fe(H2O)4(OH)2]

What happens when excess sodium hydroxide is added to [Fe(H2O)6]2+? (1)

No visible change

What is the reaction of [Fe(H2O)6]2+ with sodium carbonate solution? (1)

Forms a green precipitate of FeCO3.

What is the reaction of [Al(H2O)6]3+ with sodium hydroxide? (1)

Forms a white precipitate of [Al(H2O)3(OH)3]

What happens when excess sodium hydroxide is added to [Al(H2O)6]3+? (1)

Forms a colorless solution of [Al(H2O)2(OH)4]-

What is the reaction of [Al(H2O)6]3+ with sodium carbonate solution? (1)

Forms a white precipitate of [Al(H2O)3(OH)3] with bubbles of CO2

What is the reaction of [Fe(H2O)6]3+ with sodium hydroxide? (1)

Forms a brown precipitate of [Fe(H2O)3(OH)3]

What happens when excess sodium hydroxide is added to [Fe(H2O)6]3+? (1)

No visible change

What is the reaction of [Fe(H2O)6]3+ with sodium carbonate solution? (1)

Forms a brown precipitate of [Fe(H2O)3(OH)3] with bubbles of CO2