How much charge is required for the reduction of 1 mol of Zn2+ to Zn?
Zn2+ + 2e- ---> Zn
Number of electrons involved = 2
Charge required for the reduction of Zn2+ = 2F
We know
1F = 96,487 C
Thus,
2F = 2 x 96487 = 1,92,974 C
Using IUPAC norms write the formulate for the following coordination compounds:
(i) Hexaamminecobalt (III) chloride
(ii) Potassium tetrachloridonickelate (II)
Arrange the following in increasing order of their basic strength:
(i) C6H5 – NH2, C6H5 – CH2 – NH2, C6H5 – NH – CH3
Why does a solution containing non-volatile solute have higher boiling point than the pure solvent? Why is elevation of boiling point a colligative property?
(i) What is the principle behind the zone refining of metals?
(ii) What is the role of silica in the extraction of copper?
(iii) How is 'cast iron' different from 'pig iron'?