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

Question

In an experiment, addition of 5.0 mL, of 0.006 M BaCl 2 to 10.0 mL of arsenic sulphite sol just causes the complete coagulation in 34 h. The flocculating value of the effective ion is :, 2, 3, 4, 5

MARKS App · Accepted Answer

As 2 S 3 sol is negatively charged owing to preferential adsorption of S 2- ions. Cation would be effective ion in coagulation. Flocculating value = millimole of the effective ion per litre of sol = 5 × 0.006 × 1 0 3 5 + 1 0 = 2

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