The amino acid (S)-alanine has the physical characteristics listed under the structure

Chapter 5, Problem 5.28

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The amino acid (S)-alanine has the physical characteristics listed under the structure. COOH C CH3 NH2 H (S)-alanine [] = +8.5 mp = 297 C a. What is the melting point of (R)-alanine? b. How does the melting point of a racemic mixture of (R)- and (S)-alanine compare to the melting point of (S)-alanine? c. What is the specifi c rotation of (R)-alanine, recorded under the same conditions as the reported rotation of (S)-alanine? d. What is the optical rotation of a racemic mixture of (R)- and (S)-alanine? e. Label each of the following as optically active or inactive: a solution of pure (S)-alanine; an equal mixture of (R)- and (S)-alanine; a solution that contains 75% (S)- and 25% (R)-alanine.

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