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In an experiment, addition of 4.0mL of 0...

In an experiment, addition of `4.0mL` of `0.005MBaCl_(2)` to `16.0mL` of arsenious sulphide sol just cause the complete coagulation in `2h` . The flocculating value of the effective ion is:

A

`Cl^(Θ),1.0`

B

`Cl^(Θ),2.0`

C

`Ba^(2+),1.0`

D

`Ba^(2+),0.5`

Text Solution

Verified by Experts

`As_(2)S_(3)` sol is negatively charged owing to preferntial adsorption of `S^(2-)` ions. Cation would be the effective ions in coagulation.
Flocculating value = minimum milli of the effective
Ion per litre of sol the effective ion per litre of sol `=(4xx0.005xx10^(3))/(4+16)=1.0`
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