Metal-aqua Ions

Question 1

Fe2+ aqueous

Answer 1

Pale green

Question 2

Co2+ aqueous

Answer 2

Pink

Question 3

Cu2+ aqueous

Answer 3

Blue

Question 4

Fe2+ with NaOH

Answer 4

green ppt goes brown on air

Question 5

Co2+ with NaOH

Answer 5

Blue ppt.

Question 6

Cu2+ with NaOH

Answer 6

Light blue ppt.

Question 7

Fe2+ with NH3

Answer 7

Forms [Fe(h2o)4(oh)2]. Green ppt. Brown on air

Question 8

Copper w/ NH3

Answer 8

Light blue ppt. @ first then [cu(nh3)4]2+ deep blue solution

Question 9

Cobalt w/ nh3

Answer 9

Blue ppt. At first; then with xs [co(nh3)6] pale brown solution

Question 10

Fe2+ with carbonate

Answer 10

Green ppt.

Question 11

Copper with carbonate

Answer 11

Green- blue precipitate

Question 12

Cobalt with carbonate

Answer 12

Pink ppt.

Question 13

Fe3+ aqueous

Answer 13

Purple solution

Question 14

Al3+ aqueous

Answer 14

Colourless solution

Question 15

Fe3+ with naoh

Answer 15

Brown ppt. Just oh3

Question 16

Al3+ with NaOH

Answer 16

White ppt. Xs goes to colourless sol. Al(oh)4-

Question 17

Fe3+ with CO3 2-

Answer 17

2 fe(h2o)3(oh)3 + 3 co2 + 3 h20 brown ppt. CO2 evolved

Question 18

Al3+ with co3 2-

Answer 18

2Al(oh)3(h2o)3 + 3co2 + 3h2o white ppt