Home
Class 12
CHEMISTRY
In an amino acid the Carboxylic group io...

In an amino acid the Carboxylic group ionises at
`p^(Ka_(1))=2.40` and Ammonium ion at
`p_(Ka_(2))=9.60` then the isoelectric point is ?

Text Solution

AI Generated Solution

To find the isoelectric point (pI) of an amino acid given the pKa values of its carboxylic group and ammonium ion, we can follow these steps: ### Step-by-Step Solution: 1. **Understand the Definition of Isoelectric Point (pI)**: The isoelectric point is the pH at which the amino acid has no net electrical charge. This occurs when the positive and negative charges balance each other out. 2. **Identify Given Values**: ...
Promotional Banner

Similar Questions

Explore conceptually related problems

The pK_(a1) and pK_(a2) of an amino acid are 2.3 and 9.7 respectively. The isoelectric point of the amino acid is:

An amino acid is characterized by two pKa values the one corresponding to the more acidic site is designated as pKa_1 and the other corresponding to the less acidic site is designated as pKa_2 The isoelectric point also called isoionic point (pI) is the pH at which concentration of zwitter ion is maximum . pI is the average of pKa_1 and pKa_2 .Generally the value of pI is slightly less than 7. some amino acids have side chain with acidic or basic groups.These amino acids have pKa_3 value also for the side chain.Acidic amino acid have acidic side chains and basic amino acids have basic side chains . pI for acidic amino acid is average of pKa_1 and pKa_3 .pI for basic amino acid is the average of pKa_2 and pKa_3 . {:(S.NO,"Amino acid",p^(Ka1),p^(Ka2),p^(Ka3)("side chain")),(I,"Aspartic acid",1.88,9.6,3.65),(II,"Glutamic acid",2.19,9.67,4.25),(III,"Lysine",2.18,8.95,10.53),(IV,"Arginine",2.17,9.04,12.48):} In the table given above the acidic amino acids are

The total number of carboxylic acid groups in the product P is

Which of the following statement are correct ? 1. alpha - amino acids present in protein are alpha - L amino acids 2. Amino acids have -NH_2 as well as - COOH group 3. Number of amino groups and carboxyl groups are always same in all alpha - amino acids 4. Concentration of dipolar ion is maximum at isoeletric point Select the correct answer from the codes given below

Assume that a particular amino acid has an isoelectric point of 6.0. In a solution at pH 1.0, which of the following species will predominate ?

Assertion : Alpha (alpha)- amino acids exist as internal salt in solution as they have amino and carboxylic acid groups in near vicinity. Reason :H^(+) ion given by carboyxylic group (-COOH) is captured by amino group (-NH_(2)) having lone pair of electrons.

For a given reaction, t_(1//2) = 1 //ka . The order of this reaction is

The pKa values for the three acidic group P,Q,R are 4.3, 9.7 and 2.2 respectively, Calculate the isoelectric point of the amino acid?

Amino acids behave like salts rather than simple amines or carboxylic acids. This behavior is due to the presence of both acidic (COOH) and basic (-NH_(2)) group in the same molecule. In aqueous solution, the carboxyl group can lose a proton and amino group can accept a proton, giving rise to a dipolar lon known as Zwitter ion. Zwitter ion exists.