Question

If pK1 = 2.34 and pK2 = 9.60, then the isoelectric point pI is? *

a) 5.87

b) 5.97

c) 3.67

d) 11.94​

Answer 1

At isoelectric point the nature is zwitter ionic ie. neutral
Pk1 +pk2 /2
5.97

Answer 2

Isoelectric point pI is b) 5.97.

Given - pK1 and pK2

Find - Isoelectric point pI

Solution - The Isoelectric point is the average of pk1 and pK2.

So, calculating pI.

pI = $\frac{2.34 + 9.60}{2}$

Performing addition

pI = $\frac{11.94}{2}$

Performing division

pI = 5.97

Hence, the Isoelectric point is b) 5.97.

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