Reactions of metal ions in aqueous solution (AQA ALevel Chemistry)

Iron (II) aqueous ion

• [Fe(H₂O)₆]²⁺(aq)

• green solution

Iron (II) aqueous ion and NaOH dropwise

• Fe(H₂O)4(OH)₂(s)

• green ppt formed, (goes brown due to oxidation)

Iron (II) aqueous ion and excess NaOH

no further change

Iron (II) aqueous ion and NH₃

• Fe(H2O)₄(OH)₄(s)

• green ppt formed (goes brown due to oxidation)

Iron (II) aqueous ion and excess NH₃

no further change

Iron (II) aqueous ion and Na2CO3

• FeCO₃ (s)

• green precipitate

Iron (II) aqueous ion and conc HCl

[FeCl4]2- yellow solution

Copper (II) aqueous ion

[Cu(H20)6]2+ blue solution

Copper (II) aqueous ion and NaOH

[Cu(H2O)4(OH)2] blue precipitate

Copper (II) aqueous ion and excess NaOH

no further reaction

Copper (II) aqueous ion and NH3

[Cu(H2O)4(OH)2] blue precipitate

Copper (II) aqueous ion and excess NH3

[Cu(H2O)2(NH3)4]2+ deep blue solution

Copper (II) aqueous ion and Na2CO3

CuCO3 blue-green precipitate

Copper (II) aqueous ion and conc HCl

[CuCl4]2- green solution

Iron (III) aqueous ion

[Fe(H2O)6] 3+ pale violet but solution appears orange due to hydrolysis to some [Fe(H2O)5(OH)]2+

Iron (III) aqueous ion and NaOH

[Fe(H2O)3(OH)3] brown precipitate

Iron (III) aqueous ion and excess NaOH

no further reaction

Iron (III) aqueous ion and NH3

[Fe(H2O)3(OH)3] brown precipitate

Iron (III) aqueous ion and excess NH3

no further reaction

Iron (III) aqueous ion and Na2CO3

[Fe(H2O)3(OH)3] brown precipitate and bubbles of CO2 gas produced

Iron (III) aqueous ion and conc HCl

[FeCl4]- yellow solution

Aluminium (III) aqueous ion

[Al(H2O)6]3+ colourless solution

Aluminium (III) aqueous ion and NaOH

[Al(H2O)3(OH)3] white precipitate

Aluminium (III) aqueous ion and excess NaOH

[Al(H2O)2(OH)4]-

Aluminium (III) aqueous ion and NH3

[Al(H2O)3(OH)3] white precipitate

Aluminium (III) aqueous ion and excess NH3

no further reaction

Aluminium (III) aqueous ion and Na2CO3

[Al(H2O)3(OH)3] white precipitate and bubbles of CO2 gas

Aluminium (III) aqueous ion and conc HCl

[AlCl4]- colourless solution