Question

To determine one cation and one anion in a given salt from the given ions- pb2+ and no3-

Answer 1

Examination

Experiment Observation Inference

Colour:Note down the colour of the given salt. Blue or Bluish green May be Cu2+ or Ni2+

Greenish May be Ni2+

Light Green May be Fe2+

Dark brown May be Fe3+

Pink May be Co2+

Light pink,flesh colour or earthy colour May be Mn2+

White May be Cu2+, Ni2+, Fe2+, Fe3+ and Co2+ etc are absent.

Smell: Take a pinch of the salt between your fingers and rub with a drop of water. Ammoniacal smell

May be NH4+

Density Heavy May be the salt of Pb2+ or Ba2+

Deliquescence Salt absorbs moisture and becomes paste like. If coloured, may be Cu(NO3)2 ot FeCl3.

If colourless, Maly be Zn(NO3)2, chlorides of Zn2+, Mg2+