An electric current is passed through an aqueous solution of a mixture – InterviewSolution

1.	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 pH 6. What is the fate of the three acids?
Answer» Glutamic acid migrates to anode at 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. Solution :At pH= 6 , glutamic aicd exists as a dianionicspecies . Soit migrates to anode whilearginine arginine exists as cationic specics. So , it migrates to cathode . Alanine doesnotmigrateto any electrode at its isoelectric point .

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