RP11- Identifying Transition Metals

Question 1

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) as hexa aqua ions

Answer 1

Pale green solution
Orange/yellow solution
Blue solution
Clear and colourless

Question 2

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) when NaOH is added

Answer 2

Pale green ppt
Brown ppt
Blue ppt
White ppt

Question 3

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) when excess NaOH is added

Answer 3

Pale green ppt (no change)
Brown ppt (no change)
Blue ppt (no change)
COLOURLESS SOLUTION

Question 4

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) when NH3 is added

Answer 4

Green ppt
Brown ppt
Blue ppt
White ppt

Question 5

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) when excess NH3 is added

Answer 5

Green ppt (no change yet may go brown due to oxidation in the air)
Brown ppt (no change)
DEEP BLUE SOLUTION
White ppt (no change)

Question 6

State the colours of Fe(II) Fe(III) Cu(II) and Al(II) when sodium carbonate is added. What else will be seen in some of the reactions?

Answer 6

Green ppt
Brown ppt- effervescence due to CO2
Blue- green ppt
White ppt- effervescence due to CO2