Given below are two statements:
Statement I:
In the coagulation of a negative sol, the flocculating power of the three given ions is in the order - A1 3+ > Ba 2+ > Na +
Statement II:
In the coagulation of a positive sol, the flocculating power of the three given salts is in the order - NaCl > Na 2 SO 4 > Na 3 PO 4
In the light of the above statements, choose the most appropriate answer from the options given below:
Text Solution
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Statement I is correct but Statement II is incorrect.
According to hardy Schulze rule we know that,
In negatively charged colloid, the flocculating power of cation increases with increase in charge on the cation of electrolyte.
Therefore, the order is Al 3+ > Ba 2+ > Na +
In positively charged colloids, the flocculating power of anion increases with increases in charge on anion of electrolyte in case of positively charge colloids.
Therefore, order is NaCl < Na 2 SO 4 < Na 3 PO 4
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