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A hypothetical salt XY₃ is dissolved in water. If its measured van't Hoff factor is 2.8 , the percentage of dissociation of the salt is ______ .

Correct answer

60

Step-by-step solution

For the salt XY₃ , the number of ions produced per formula unit upon complete dissociation is n = 4 . The relation between van't Hoff factor ( i ) and degree of dissociation ( ) is given by: i = 1 + (n - 1) Substituting the given values: 2.8 = 1 + (4 - 1) 1.8 = 3 = 0.6 The percentage of dissociation is 0.6 100 = 60 . Answer: 60

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