AP EAMCET202124 Aug 2021Morning ShiftChemistryIonic EquilibriumActual
In an amino acid, the carboxylic group ionises at pH =2.56 ( pK _ a ₁ ) and ammonium ion ionises at pH =9.38 ( pK _ a ₂ ) . The isoelectric point of the amino acid is at
Options
- A11.94
- B6.82
- C5.97
- D3.41
Correct answer
C. 5.97
Step-by-step solution
p K_ a 1 =256, p K_ a₂ =9.38 At isoelectric point ( pH )= p K_ a₁ + p K_ a₂ 2 = 2.56+9.38 2 =5.97