Transition Metals

Question 1

What colour is aqueous Iron (II)

Answer 1

green solution

Question 2

What colour is aqueous Copper(II)

Answer 2

blue solution

Question 3

What colour is aqueous Iron (III)

Answer 3

Purple solution (may look yellow-brown due to some [Fe(H20)5(OH)]2(aq)

Question 4

What colour is aqueous aluminum (III)

Answer 4

Colourless solution

Question 5

Iron (II) + NaOH

Answer 5

Fe(H20)4(OH)2 (s)

green ppt goes brown on standing in air

Question 6

Copper (II) + NaOH

Answer 6

Cu(H20)4(OH)2 (s)

blue ppt

Question 7

Iron (III) + NaOH

Answer 7

Fe(H20)3(OH)2 (s)

brown ppt

Question 8

Aluminium (III) + NaOH

Answer 8

Al(H20)3(OH)3 (s)

white ppt

Question 9

Iron (II) + excess NaOH

Answer 9

No further change

Question 10

Copper (II) + excess NaOH

Answer 10

No further change

Question 11

Iron (III) + excess NaOH

Answer 11

No further change

Question 12

Aluminum (III) + excess NaOH

Answer 12

[Al(OH)4]- (aq)

colourless solution

Question 13

Iron (II) + NH3 (aq)

Answer 13

Fe(H2O)4(OH)2 (s)

green ppt goes brown on standing in air

Question 14

Copper (II) + NH3(aq)

Answer 14

Cu(H20)4(OH)2 (s)

blue ppt

Question 15

Iron (III) + NH3 (aq)

Answer 15

Fe(H20)3(OH)3 (s)

brown ppt

Question 16

Aluminum (III) + NH3 (aq)

Answer 16

Al(H20)3(OH)3 (s)

white ppt

Question 17

Iron (II) + excess NH3 (aq)

Answer 17

no further change

Question 18

Copper (II) + excess NH3 (aq)

Answer 18

[Cu(H20)2(NH3)4]2+ (aq)

deep blue solution

Question 19

Iron (III) + excess NH3 (aq)

Answer 19

no further change

Question 20

aluminum (III) + excess NH3 (aq)

Answer 20

no further change

Question 21

Iron (II) + Na2CO3(aq)

Answer 21

FeCO3 (s)

green ppt

Question 22

Copper (II) + Na2CO3 (aq)

Answer 22

CuCO3 (s)

blue-green ppt

Question 23

Iron (III) + Na2CO3 (aq)

Answer 23

Fe(H20)3(OH)3 (s)

brown ppt + C02 effervescence

Question 24

Aluminum (III) + Na2CO3 (aq)

Answer 24

Al(H20)3(OH)3 (s)

white ppt + CO2 effervescence