Reactions

Question 1

Copper (II) in Aqueous Solution

Answer 1

Blue Solution

Question 2

Copper (II) with some NaOH or NH3

Answer 2

Pale Blue Precipitate

Question 3

Copper (II) with excess NaOH

Answer 3

No change (Pale Blue Precipitate)

Question 4

Copper (II) with excess NH3

Answer 4

Dark Blue Solution

Question 5

Iron (II) in aqueous solution

Answer 5

Pale Green Solution

Question 6

Iron (II) with some NaOH or NH3

Answer 6

Dark Green Precipitate

Question 7

Iron (II) with excess NaOH

Answer 7

No change (dark green precipitate)

Question 8

Iron (II) with excess NH3

Answer 8

No change (Dark green precipitate)

Question 9

Iron (III) in aqueous solution

Answer 9

Yellow solution

Question 10

Iron (III) with some NaOH or NH3

Answer 10

Orange-brown Precipitate

Question 11

Iron (III) with excess NaOH

Answer 11

No change (Orange-brown precipitate)

Question 12

Iron (III) with excess NH3

Answer 12

No change (Orange-brown precipitate)

Question 13

Manganese (II) in aqueous solution

Answer 13

Pale Pink Solution (Colourless)

Question 14

Manganese (II) with some NaOH or NH3

Answer 14

Pale Brown Precipitate

Question 15

Manganese (II) with excess NaOH

Answer 15

No change (pale brown precipitate)

Question 16

Manganese (II) with excess NH3

Answer 16

No change (pale brown precipitate)

Question 17

Chromium (III) in aqueous solution

Answer 17

Green solution

Question 18

Chromium (III) with some NaOH or NH3

Answer 18

Dark green precipitate

Question 19

Chromium (III) with excess NaOH

Answer 19

Dark green solution

Question 20

Chromium (III) with excess NH3

Answer 20

Purple solution