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What will be the value of van't Hoff fac...

What will be the value of van't Hoff factor (i) of benzoic acid if it dimerises in aqueous solution ? How will the experimental molecular weight vary as compared to the normal molecular weight?

Text Solution

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`i=("Particles after association")/("Particles befor association")`
`=(1)/(2)=0.5`
The experimental molecular weight of benzoic acid is double of the normal molecular weight because number of particles reduces to almost one half due to the formation of dimer.
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