Define the term partition coefficient, Kpc.

1. (a)Define the term partition coefficient, Kpc.[2]
2. (b)(i)A solution of 0.400 g of benzoic acid in 25.0 cm³ octan-1-ol is shaken with 125 cm³ of water. Calculate the mass of benzoic acid extracted into the water layer. mass of benzoic acid extracted = g [2][2]
3. (b)(ii)Kpc of benzophenone, C₆H₅COC₆H₅, between octan-1-ol and water is different from the value of Kpc of benzoic acid given in (b)(i). Explain why.[1]
4. (c)(i)Deduce the identities of organic compounds J and K and draw their structures in the boxes.[2]
5. (c)(ii)Suggest reagents and conditions for step 1.[1]
6. (d)(i)Deduce the identity of compound L and draw its structure in the box.[1]
7. (d)(ii)Name the mechanism of step 3 and suggest reagents and conditions for step 3. mechanism of step 3 reagents and conditions[2]
8. (d)(iii)Deduce the type of reaction in step 4.[1]
9. (e)(i)Deduce the number of peaks that would be present in the carbon-13 NMR spectrum of benzophenone. number of peaks[1]
10. (e)(ii)Identify two different environments of carbon atom that would result in different chemical shift ranges in this carbon-13 NMR spectrum of benzophenone. environment of carbon atom chemical shift range (δ)[2]

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