pH and Buffers

Question 1

pH of Sodium phosphate buffer

Answer 1

7.2

Question 2

pH of sodium acetate buffer

Answer 2

4.7

Question 3

is a convenient way of expressing the concentration of hydronium ions, (H3O+) present by means of the logarithmic function.

Answer 3

pH of a solution

Question 4

The resistance of a solution to changes in hydronium ion concentration upon addition of small amounts of acid or alkali

Answer 4

Buffer action

Question 5

a solution that can resist pH change upon the addition of an acidic or basic components

Answer 5

Buffer solution

Question 6

Combination of Buffer system

Answer 6

-a weak acid and its salt or -a weak base and its salt

Question 7

buffer system resists ____ __ pH most effectively when the pH of the system is close or equal to the ___ of the weak acid

Answer 7

-changes in
-pKa

Question 8

The most precise way to measure pH?

Answer 8

pH meters

Question 9

The pH meter is composed of?

Answer 9

1. a Refrence electrode
2. a Glass electrode
3. Electrometer

Question 10

the basic function of which is to maintain a constant electrical potential

Answer 10

Reference electrode

Question 11

which potential depends on the pH of the solution surrounding it

Answer 11

Glass electrode

Question 12

a device capable of measuring very small potential differences

Answer 12

Electrometer

Question 13

How do error arise?

Answer 13

If the unknown and standard solutions differ substantially in ionic strength or if the calibration of the electrode with the standard buffer is carried out at a different temperature.

Question 14

Biochemical reactions are greatly influenced by the

Answer 14

Hydronium Ion Concentration