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  4. For a very dilute aqueous solution of K4Fe(CN)6, van't Hoff factor

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Q. For a very dilute aqueous solution of $K_4Fe(CN)_6$, van't Hoff factor

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Solution:

$K_4Fe(CN)_6$, a very stable complex compound in aqueous solution ionises as follows
$K _4\left[ Fe ( CN )_6\right] \xrightleftharpoons{\text { water }}4 K ^{+}+\left[ Fe ( CN )_6\right]^{4-}$
$\therefore $ van't Hoff factor, $i = 5.$