POTENTIOMETRY

Question 1

Based on static (zero-current) measurements. Used to obtain information on the composition of an analyte

Answer 1

POTENTIOMETRY

Question 2

is a kind of electro analytical techniques in that the potential difference between two electrodes of electrochemical cell is measured under condition of zero current.

Answer 2

Potentiometry

Question 3

A device for measuring the potential of an electrochemical cell without drawing a current or altering the cell’s composition.

Answer 3

Potentiometer

Question 4

Two electrodes connected to Potentiometer to measure potential difference

Answer 4

Indicator Electrode

Question 5

potential respond to change according to conc. of ions

Answer 5

Reference Electrode

Question 6

are required to complete the circuit between the electrodes.

Answer 6

Liquid Junction (Salt Bridge)

Question 7

is an electrochemical half-cell that is used as a fixed reference for the measurement of cell potentials.

Answer 7

Reference Electrode

Question 8

3 types of reference electrode

Answer 8

1. Calomel
2. Silver/Silver Chloride
   Normal Hydrogen Electrode

Question 9

composed of mercury/mercurous chloride; It is dependable but large, bulky, and affected by temperature.

Answer 9

Calomel electrode

Question 10

-Widely used because simple, inexpensive, very stable and non-toxic.
- reference electrodes are more compact
-overall better & faster

Answer 10

Silver/Silver Chloride

Question 11

consists of a platinized platinum electrode in HCl solution with hydrogen at atmospheric pressure bubbled over the platinum surface.

Answer 11

Normal Hydrogen Electrode

Question 13

A calomel electrode saturated with ___ is called a _____

Answer 13

KCl
Saturated Calomel electrode

Question 14

The most fundamental reference electrode in electrochemistry.

Answer 14

Standard Hydrogen Electrode

Question 15

A potential difference between two solutions of different compositions separated by a membrane type separator.

Answer 15

Liquid-Junction Potential

Question 16

For a simple case, the value of the liquid junction potential can be calculated by the so called

Answer 16

Henderson Equation

Question 17

2 types of indicator electrodes

Answer 17

Metallic indicator electrode &inert electrode

Question 18

develop a potential that is determined by the equilibrium position of redox half-reaction at the electrode surface.

Answer 18

metallic indicator electrode

Question 19

Chemically inert conductors such as gold, platinum, or carbon that do not participate, directly, in the redox process are called

Answer 19

Inert Elctrode

Question 20

produces a potential that is proportional to the concentration of an analyte.

Answer 20

Ion selctive electrode (ISE)

Question 21

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