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(D) According to the $Hardy-Schulze$ rule,the coagulating (or flocculating) power of an ion depends on its valency. For a positively charged sol,the c

Vedclass · Accepted Answer

$[Fe(CN)_6]^{4-} > PO_4^{3-} > SO_4^{2-} > Cl^{-}$

Vedclass · Answer

(D) According to the $Hardy-Schulze$ rule,the coagulating (or flocculating) power of an ion depends on its valency. For a positively charged sol,the coagulating power of the anions increases with the increase in the magnitude of their negative charge. The valencies of the given ions are: $[Fe(CN)_6]^{4-}$ $(4-)$,$PO_4^{3-}$ $(3-)$,$SO_4^{2-}$ $(2-)$,and $Cl^{-}$ $(1-)$. Therefore,the order of flocculating power is $[Fe(CN)_6]^{4-} > PO_4^{3-} > SO_4^{2-} > Cl^{-}$.

For the coagulation of a positively charged hydrated ferric oxide sol,the flocculating power of the ions is in the order:

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