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When FeCl3 solution is added to NaOH a ...

When `FeCl_3` solution is added to NaOH a negatively charged sol is obtained. It is due to the:

A

Presence of basic group

B

Preferential adsorption of `OH^–` ions

C

Self dissociation

D

Electron capture by sol particles

Text Solution

Verified by Experts

`FeCl_2+3NaOH to Fe(OH)_3+3NaCl`
`NaOH to Na^(+) +OH^(-)`
`OH^(–)` ions having similarity with `Fe(OH)_3` will be adsorbed on the surface of `Fe(OH)_3` to form an electrical double layer
`Fe(OH)_3 |:(OH^(-)),(OH^(-)),(OH^(-)):||:(Na^(+)),(Na^(+)),(Na^(+)):|`
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