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If a centimolal aqueous solution of $\mathrm{K}_{3}\left[\mathrm{~F}_{\mathrm{e}}(\mathrm{CN})_{6}\right]$ has degree of dissociation $0 \cdot 78$, what is the value of vant Hoff factor?
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3.34
(A)
$\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \longrightarrow 3 \mathrm{~K}^{+}+\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-}$
$\therefore \mathrm{n}=4$
van't Hoff factor (i) $=1+\alpha(n-1)=1+0.78(4-1)=3.34$
$\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right] \longrightarrow 3 \mathrm{~K}^{+}+\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{-}$
$\therefore \mathrm{n}=4$
van't Hoff factor (i) $=1+\alpha(n-1)=1+0.78(4-1)=3.34$
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