The coagulation value of BaCl2 is lower than KCl that of sol-A
The coagulation value of Na2SO4 is lower than NaBr that of sol-B
(1) A & B = - (2) A = + & B = - (3) A & B = + (4) A = - & B = +
please explain answer of this question step by step
standard-12
chemistry
chapter-5 surface chemistry
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Answer:
The answer is (4)
Explanation:
According to HS Rule, Coagulation value is inv. proportional to Coagulating power...
For Sol A :- The Coagulating ions are Ba2+ (because of its divalent nature) and K+
More the valency, more will be the Coagulating power, => Less will be Coagulation value :. Ba2+ coagulates the Sol, since a positive ion is involved the Sol A is -vely charged....
Similarly, for Sol B :- The same case is applied and hence So42- will have less coagulation value than Br- as per HS Rule, thereby So42- coagulates the Sol, since a negative ion is involved in coagulation, Sol B is +vely charged....
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