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In an experiment, addition of 5.0mL , of...

In an experiment, addition of `5.0mL` , of `0.006MBaCl_(2)` to `10.0mL` of arsenic sulphite sol just causes the complete coagulation in `34h` . The flocculating value of the effective ion is:

A

2

B

3

C

4

D

5

Text Solution

Verified by Experts

The correct Answer is:
A
`As_(2)S_(3)` sol is negatively charged owing to preferential adsorption of `S^(2)` ions. Would be effective ion in coagulation.
Flocculating value=milimole of the effective ion per litre of sol
`=(5xx0.006xx10^(3))/(5+10)=2`
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