An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0) glutamic acid (3.2) and arginine (10.7) buffered at $\mathrm{pH}$ 6. What is the fate of the three acids?

Question

An electric current is passed through an aqueous solution of a mixture of alanine (isoelectric point 6.0) glutamic acid (3.2) and arginine (10.7) buffered at $\mathrm{pH}$ 6. What is the fate of the three acids?, Glutamic acid migrates to anode at $\mathrm{pH}$ 6. Arginine is present as a cation and migrates to the cathode. Alanine in a dipolar ion remains uniformly distributed in solution., Glutamic acid migrates to cathode and others remain uniformly distributed in solution., All three remain uniformly distributed in solution., All three move to cathode

MARKS App · Accepted Answer

Hints : At $\mathrm{pH}=6$, glutamic acid exists as a dianionic species & migrates to anode while arginine exists as cationic species & moves to cathode. Alanine does not migrate to any electrode at its isoelectric point .

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