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Q. The charge on $Fe(OH)_3$ sol is due to

J & K CETJ & K CET 2010Surface Chemistry

Solution:

$Fe ( OH )_{3}$ sol carries charge because of the adsorption of ferric ions as
$Fe ( OH )_{3}+ FeCl _{3} \rightarrow \underset{\text { sol of ferric hydroxide }}{ Fe ( OH )_{3}}: Fe ^{3+}+3 Cl ^{-}$