Question

2g of benzoic acid dissolved in 25g of benzene the observed molar mass of benzoic acid is found to be

Answer 1

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Answer 2

Hey dear,

● Answer -
Observed molecular mass = 4 g

● Explanation -
- When benzoic acid is dissolved in benzene, molecules of benzoic acid dimerize due to presence of hydrogen bonding.
- Due to this dimerization, experimental molecular mass of benzoic acid is found yo be double that of expected molecular mass.
- That is, when 2 g of benzoic acid is dissolved in benzene, observed molecular mass of benzoic acid will be 4 g.

Thank you...