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Which of the following will be the most ...

Which of the following will be the most effective in the coagulation of `Fe(OH)_(3)` sol ?

A

`Mg(PO_(4))_(2)`

B

`BeCl_(2)`

C

`NaCl`

D

`KCN`

Text Solution

Verified by Experts

The correct Answer is:
A
Accrding to Hardy Schulze rule, coagulation power of lons is directiy proportional to charge on ion.
`:.Fe(OH)_(3)` is positively charged colloid.
`:.` It will be coagulated anion.
(a) `Mg_(3)(PO_(4))_(2)hArr 3Mg^(2+) + 2PO_(4)^(3-)`
(b) `BaCl_(2)hArrBa^(2+) + 2Cl^(-)`
(c ) `NaClhArr Na^(+) + Cl^(-)`
(d)`KCN hArrK^(+) + CN^(-)`
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