If NaCl is mixed in water. What is the van’t Hoff factor.

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Solution

The correct option is C 2
As we know Van’t Hoff factor
$= \frac{N o . o f . P a r t i c l e s f i n a l l y i n t h e s o l u t i o n}{N o . o f p a r t i c l e s i n t i a l l y t a k e n}$
In solution
$N a C l \to N a^{+} + C l^{-}$
If 1 mole is taken 2 moles of ions are produced $(1 N a^{+}, 1 C l^{-})$
van't Hoff factor = $\frac{2 m o l e s}{1 m o l e} = 2$

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