i need answer for question 4 phos Inc 5htpa/www.oplbo.comsdereBtA Sob Scu-pHNSsp

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i need answer for question 4

phos Inc 5htpa/www.oplbo.comsdereBtA Sob Scu-pHNSspp ERa20Espedspeimen 235 coTections StR.docs b) The initial molality of benzoic acid in biphenyl and benzophenone c) The ratio of the observed molality to the initial molality d) The observed molecular weight of benzoic acid in biphenyl and benzophenone. Make sure that you fill with numbers only green fields, the gray fields should be calculated u formulas. You should submit TWO excel print-outs: one with numbers and another with forn (Press CTRI.+ to see/print the formulas) 3. Why is ratio of the observed molality to the initial molality of benzoic acid in biphenyl and benzophenone not equal to one? 4. Why are the ratios of the observed molality to the initial molality different in biphenyl and benzophenone? DOLL

Explanation / Answer

4. Benzoic acid can dimerise in bipheny due to hydrogen bonding. Hence its molecular weight will be different from the monomer.

Since it's molecular weight is cganging, it's molality will be different from the theoritical value.

Where as in benzophenone, benzoic acid has less tendency to form dimers, because of polarity of benzophenone. As a result molecular mass does not change and molality will remain unchange,.

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