Buffers

Question 1

Compounds or mixtures of compounds that by their presence in the solution resist changes in the pH upon the addition of a small quantities of acid or alkali

Answer 1

Buffers

Question 2

Why it is necessary to put a buffer in a solution?

Answer 2

To maintain pH at some fairly constant value when even small amounts of acid or base are added.

Question 3

Combination of weak acid and it’s salt with a strong base.

Answer 3

Acidic buffers

Question 4

Combination of weak base and it’s salt with a strong acid.

Answer 4

Basic Buffers

Question 5

The resistance of a buffer solution to a change in ph.

Answer 5

Buffer action

Question 6

Who invented the buffer equation.

Answer 6

Henderson-Hasselbalch equation

Question 7

It helps in calculating the pH value of a buffer, solution if the concentrations of acid as well as that of the salt are known.

Answer 7

Henderson-Hasselbalch

Question 8

A measure of its magnitude of its resistance to change in the pH on an addition of an acid or a base.

Answer 8

Buffer Capacity

Question 9

Other terms for buffer capacity?

Answer 9

Buffer index, buffer value, buffer effeciency or buffer coefficient.

Question 10

Give examples in application of buffers?

Answer 10

*Biological systems
*Pharmaceutical systems( to adjust the pH of the product to that required for maximum capacity)
*Parental preparations
*Opthalmic preparations
*Ointments and cream