The amino acid alanine has two isomers, α-alanine and β-alanine. When equal masses of these two compounds are dissolved in equal mass of a solvent, the solution of α-alanine freezes at relatively lowe

Question

The amino acid alanine has two isomers, α-alanine and β-alanine. When equal masses of these two compounds are dissolved in equal mass of a solvent, the solution of α-alanine freezes at relatively lower temperature. Which form, α-alanine or β-alanine, has the larger equilibrium constant for ionization?

Prashant Kotian · Accepted Answer

Correct answer: A. A lower freezing point means greater ΔT_f, hence higher effective particle concentration (i * m). Since the initial molality is the same for both, α-alanine must have a greater degree of ionization (i_alpha > i_beta). Thus, α-alanine has the larger equilibrium constant for ionization.

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