What is the van’t Hoff factor when $A l C l_{3}$ , is mixed in the solution?

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Solution

The correct option is D 4
In solution $A l C l_{3} \to A l^{3 +} + 3 C l^{-}$
Molecule gives 4 ions.
van't Hoff factors = $\frac{f i n a l n o . o f p a r t i c l e s}{N o . o f p a r t i c l e s i n t i a l l y t a k e n}$
$= \frac{3 + 1}{1} = 4$

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