Virtual Labs

Tools

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Aim

Theory

Pretest

Procedure

Simulation

Posttest

References

Feedback

Determine the pI of a glycine using potentiometric method

Choose difficulty:

Beginner

Intermediate

Advanced

During the potentiometric titration of glycine, the titrant is

a: Hydrochloric acid Explanation

Explanation

b: Sodium hydroxide Explanation

Explanation

c: Potassium permanganate Explanation

Explanation

d: Acetic acid Explanation

Explanation

How is the isoelectric point (pI) of glycine determined using the potentiometric method?

a: By identifying the pH corresponding to the maximum conductivity Explanation

Explanation

b: By calculating the average of the pKa values of the amino and carboxyl groups Explanation

Explanation

c: By estimating the pH difference between start and end point. Explanation

Explanation

d: By finding the point of maximum buffer capacity. Explanation

Explanation

The shape of the titration curve for glycine with NaOH is closely resembles to a

a: straight line Explanation

Explanation

b: parabola Explanation

Explanation

c: hyperbola Explanation

Explanation

d: sigmoid Explanation

Explanation

pI of glycine does NOT depend on

a: temperature of the medium Explanation

Explanation

b: ionic strength of the medium Explanation

Explanation

c: pH of the medium Explanation

Explanation

d: polarity of the medium Explanation

Explanation

A pH-electrode consists of

a: Only glass electrode Explanation

Explanation

b: A glass-electrode and a Ag-AgCl electrode Explanation

Explanation

c: A calomel-electrode and a Ag-AgCl electrode Explanation

Explanation

d: Only a Ag-AgCl electrode Explanation

Explanation

Community Links Sakshat Portal Outreach Portal FAQ: Virtual Labs

AGPL 3.0 & Creative Commons (CC BY-NC-SA 4.0)