1.

Fe^(+3) ions in an aqueous solution gives deep red colouration with both sodium acetate (in excess) and ammonium thiocyanate(slightly acidic). The deep red colouration obtained with ammonium thiocyanate gets decolourised on addition of a solution containing F^(-) ions. What happens when deep red coloured solution of is diluted with water and then boiled?

Answer»

A deep red solution of ferric acetate is obtained
A reddish-brown precipitate of BASIC ferric acetate is obtained
A deep red precipitate of ferric hydroxide is obtained
A yellow colour precipitate of a COMPLEX `[Fe(CH_(3)COO)_(6)]^(3-)` is obtained.

Solution :`Fe(SCN)_(3) overset(F^(-))rarr [feF_(6)]^(3-)` colourless `(sp^(3)d^(2))`
`underset(("Red colouration"))([Fe_(3)(OH)_(2)(CH_(3)COO)_(6)]^(+))+4H_(2)O rarr underset(("Red ppt"))(3Fe(OH)_(2)CH_(3)COOdarr)+3CH_(3)COOH +H^(+)`


Discussion

No Comment Found