Question

for the coagulation of Al2O3.xH2O,the flocculation power is highest for

Answer 1

Flocculating value ∝

(z)

1

where z= valency of coagulation ion.

Since, Fe(OH)

3

is a positively charged ions considering the valencies of various negative ions used i.e. Cl

−

,S

2−

,PO

4

3−

and SO

4

2−

, we find the valency of Cl

−

is least so it will have maximum flocculation value i.e., NaCl

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