Given below are two statements: Statement I: In the coagulation of negative sol, the flocculating power of the three given ions is in the order- $Al^{3+} Ba^{2+} Na^+$ Statement II: In the coagulation of positive sol, the flocculating power of the three slats is in the order- $NaCl Na_2SO_4 Na_3PO_4$ In the light of the above statements, choose the most appropriate answer from the options given below:

Question

Given below are two statements: Statement I: In the coagulation of negative sol, the flocculating power of the three given ions is in the order- $Al^{3+} > Ba^{2+} > Na^+$ Statement II: In the coagulation of positive sol, the flocculating power of the three slats is in the order- $NaCl > Na_2SO_4 > Na_3PO_4$ In the light of the above statements, choose the most appropriate answer from the options given below:

Dr. Abubacker · Accepted Answer

[Solution] By the Hardy-Schulze rule, flocculating power increases with the charge of the coagulating ion; for a positive sol the order is $Na_3PO_4 > Na_2SO_4 > NaCl$, so Statement II is incorrect. Answer (4).

Explanation

Reviewed by Dr. Abubacker

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