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WorksheetsChange of Fe2+ to Fe3+ and vice versa
Total questions: 11
Worksheet time: 11mins
Iron(II) ions change to Iron(III) ions is a process of .....
reduction
oxidation
combustion
displacement
When Iron(II) ions changed to Iron(III) ions....
colour turns from green to brown
no changes
become bigger
colour turn from brown to green
Here are examples of oxidising agents except.....
Potassium dichromate(VI)
Potassium permanganate
Potassium hexacyanoferrate(II)
Bromine water
When sodium hydroxide solution is added to the Iron(III) solution until excess
A brown solution is formed
A brown precipitate is formed
A green precipitate is formed
A green solution is formed
The examples of indicator to test the presence of Iron(III) ions is .....
Litmus paper
Universal indicator
Potassium hexacyanoferrate(II)
Starch solution
Iron(III) ions ............... electron when change to Iron(II) ions
gain
lose
Choose a correct half equation which represent the change of Iron(III) to Iron(II) ions
Fe3+ + e ---> Fe2+
Fe2+ + e ---> Fe3+
Fe3+ -----> Fe2+ + e
Fe2+ ---> Fe3+ + e
Bromine oxidised Iron(II) ions, so bromine is ....
reducing agent
oxidising agent
Colour of Iron(II) ion is .....
blue
brown
black
green
When sodium hydroxide solution is added to the Iron(III) solution until excess
a yellow precipitate is formed
a white precipitate is formed
a green precipitate is formed
a brown precipitate is formed
Below here are examples of reducing agent except
Magnesium
Sulphur dioxide
Hydrogen sulphide
Chlorine water
