Reactions of ions in aqueous solutions

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Total cards: 24•Content version: v4•Public deck•Updated: 8/1/2026

Card preview (24)

Front (Question)

State what you would observe when NaOH is added to the aqueous ion of Fe (II)

Back (Answer)

Green ppt formed which goes brown when left standing in air

Front (Question)

State what you would observe when NaOH is added to the aqueous ion of Cu (II)

Back (Answer)

(Light) blue ppt formed

Front (Question)

State what you would observe when NaOH is added to the aqueous ion of Fe (III)

Back (Answer)

Brown ppt formed (may look orange-brown)

Front (Question)

State what you would observe when NaOH is added to the aqueous ion of Al (III)

Back (Answer)

White ppt formed

Front (Question)

State what you would observe when NaOH is added to the aqueous ion of Co (II)

Back (Answer)

(Dark) blue ppt formed

Front (Question)

What colour is the solution of the aqueous ion of Fe (II)?

Back (Answer)

Green

Front (Question)

What colour is the solution of the aqueous ion of Fe (III)?

Back (Answer)

Purple (may look yellow-brown)

Front (Question)

What colour is the solution of the aqueous ion of Al (III)?

Back (Answer)

Colourless

Front (Question)

What colour is the solution of the aqueous ion of Cu (II)?

Back (Answer)

Blue

#10

Front (Question)

What colour is the solution of the aqueous ion of Co (II)?

Back (Answer)

Pink

#11

Front (Question)

The aqueous ion of Fe (III) is purple. However, the solution sometimes appears yellow-brown. Why is this?

Back (Answer)

Some [Fe(H2O)5(OH)2]2+ has been formed

#12

Front (Question)

NaOH is added to Fe (I) and a green ppt is formed. Excess NaOH is then added. What will be observed (if anything)?

Back (Answer)

No further change

#13

Front (Question)

NaOH is added to Cu (II) and a blue ppt is formed. Excess NaOH is then added. What will be observed (if anything)?

Back (Answer)

No further change

#14

Front (Question)

NaOH is added to Fe (III) and a brown ppt is formed. Excess NaOH is then added. What will be observed (if anything)?

Back (Answer)

No further change

#15

Front (Question)

NaOH is added to Al (III) and a white ppt is formed. Excess NaOH is then added. What will be observed (if anything)?

Back (Answer)

Colourless soln. formed (but different complex from original aq ion)

#16

Front (Question)

State what you would observe when NH3 is added to the aqueous ion of Fe (II)

Back (Answer)

Green ppt formed which goes brown on standing in air

#17

Front (Question)

State what you would observe when NH3 is added to the aqueous ion of Cu (II)

Back (Answer)

(Light) blue ppt formed

#18

Front (Question)

State what you would observe when NH3 is added to the aqueous ion of Fe (III)

Back (Answer)

Brown ppt (may look orange-brown)

#19

Front (Question)

State what you would observe when NH3 is added to the aqueous ion of Al (III)

Back (Answer)

White ppt formed

#20

Front (Question)

State what you would observe when excess NH3 is added to the aqueous ion of Co (II)

Back (Answer)

Pale brown soln. formed

#21

Front (Question)

NH3 is added to Fe (II) and a green ppt is formed. Excess NH3 is then added. What will be observed (if anything)?

Back (Answer)

No further change

#22

Front (Question)

NH3 is added to Cu (II) and a blue ppt is formed. Excess NH3 is then added. What will be observed (if anything)?

Back (Answer)

Deep blue soln. formed

#23

Front (Question)

NH3 is added to Fe (III) and a brown ppt is formed. Excess NH3 is then added. What will be observed (if anything)?

Back (Answer)

No further change

#24

Front (Question)

NH3 is added to Al (III) and a white ppt is formed. Excess NH3 is then added. What will be observed (if anything)?

Back (Answer)

No further change