Problem: Give the pH at which histidine exists In the following form. A) 0 B) 4 C) 8 D) 12 E) 14

FREE Expert Solution

histidine: pKa 1 = 1.82 (-COOH) ; pKa 2 = 9.17 (-NH2); pKa 3 = 6.00 (R group)

pH > pKa → deprotonate

pH < pKa → protonate 

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Problem Details

Give the pH at which histidine exists In the following form. 

A) 0 

B) 4 

C) 8 

D) 12 

E) 14

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What scientific concept do you need to know in order to solve this problem?

Our tutors have indicated that to solve this problem you will need to apply the Acid-Base Properties of Amino Acids concept. You can view video lessons to learn Acid-Base Properties of Amino Acids . Or if you need more Acid-Base Properties of Amino Acids practice, you can also practice Acid-Base Properties of Amino Acids practice problems.