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Which of the following ionic substances ...

Which of the following ionic substances will be most effective in precipitating the sulphur sol?
a. `KCl`
b. `BaCl_(2)`
c. `Fe_(2)(SO_(4))_(3)`
d. `Na_(3)PO_(4)`

A

KCl

B

`BaC_2`

C

`F_2e_4C_3`

D

`N_3a_4F`

Text Solution

Verified by Experts

Sulphur sol is a lyophobic colloid and it can be coagulated most effectively by `AL^(3+)` The precipitating power of an electrolyte is directly proportional to the fourth power of the valency of the ions causing precipitation. Hence `F_2e_4C_3` is most suitable.
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