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Which one of the following electrolytes has the same value of van's Hoff's factor (i) as that of A l 2 S O 4 3 (if all are 100 % ionized)?

Options

  1. AK 2 S O 4
  2. BK 3 F e C N 6
  3. CA l N O 3 3
  4. DK 4 F e C N 6

Correct answer

D. K 4 F e C N 6

Step-by-step solution

A l 2 S O 4 3 → 2 A l 3 + + 3 S O 4 2 -   ( i = 5 ) K 2 S O 4 → 2 K + + S O 4 2 -   ( i = 3 ) K 3 F e C N 6 → 3 K + + F e C N 6 3 -   ( i = 4 ) Al NO 3 3 → Al 3 + + 3 NO 3 -   ( i = 4 ) K 4 Fe CN 6 → 4 K + + Fe CN 6   4 -   ( i = 5 )

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