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  3. Chemistry
  4. Which one of the following electrolytes has the same value of van’t Hoff’s factor (i) as that of Al2(SO4)3 (if all are 100% ionised) ?

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Q. Which one of the following electrolytes has the same value of van’t Hoff’s factor (i) as that of $\ce{Al_2(SO_4)_3}$ (if all are 100% ionised) ?

AIPMTAIPMT 2015

Solution:

van't Hoff factor of
$\ce{Al_2 (SO_4)_3 -> 2Al^{+3} + 3SO^{-2}_4}$
so n = 5
$\ce{K_4 [Fe(CN)_6] -> 4K^{+} + [Fe(CN)_6]^{-4}}$
so n =5 $\Rightarrow $ i = n =5