Question

1. Write an ionic equation representing the oxidising
property of acidified KMnO4 solution. ?
2. Why is K2Cr2O7 generally preferred over Na2Cr20, in
volumetric analysis?

3. Write the balanced equation for the reaction of
K2Cr2O7 with ferrous sulphate solution in the
presence of dil.H2SO4.?
4. Why do lanthanides form coloured ions ?
5. Write the general outer electronic configuration of
lanthanides.?​

Answer 1

1. 2MnO4- + 16H+ + 10I- → 2Mn2+ + 5I2 + 8H2O

2,3,4 and 5.see the above pic

hope it helps

Answer 2

Answer:

yes it is too useful for me ....

thanks you very much..(✷‿✷)