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What happens when freshly prepared Fe(OH)3 is shaken with a little amount of dilute solution of FeCl3?

What happens when freshly prepared Fe(OH)3 is shaken with a little amount of dilute solution of FeCl3?

Grade:upto college level

2 Answers

Sunil Kumar FP
askIITians Faculty 183 Points
7 years ago
Peptization takes place forming a positively charged colloidal sol of Fe(OH)3
Peptization is a process of passing of a precipitate into colloidal particles on adding suitable electrolyte. The electrolyte added is known as peptizing agent. A few examples of sols obtained by peptization are given below:

A reddish brown colored colloidal solution is obtained by adding small quantity of ferric chloride solution to the freshly precipitated ferric hydroxide.
nandini
11 Points
5 years ago
Charge on sol is decided by preferential adsorption of charge present in the medium.As fe3+ ions are common in fe(OH)3 and fecl3 and fe3+ ions are common in fe(OH)3 & fecl3.Fe3+ ions are preferentially adsorbed over fe(OH)3 molecules and break them to colloidal size

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