MODULE 13

Question 1

Widely used by inorganic, physical, biological chemists

Answer 1

voltammetry

Question 2

Current that develops in an electrochemical cell is measured under conditions of complete concentration polarization.

Answer 2

voltammetry

Question 3

Measurements are made at currents that approach zero and where polarization is absent.

Answer 3

potentiometric

Question 4

Measures are taken to minimize or compensate for the effects of concentration polarization.

Answer 4

coulometry

Question 5

ALL OF THE ANALYTE IS CONVERTED TO
ANOTHER STATE

Answer 5

coulometry

Question 6

study of current-potential relations in an electrolysis cell where the current is determined solely by the rate of diffusion of an electroactive
species.

Answer 6

voltammetry

Question 7

capable of exhibiting electrical activity.

Answer 7

Electroactive species

Question 8

Added to the solution to suppress the migration of electroactive species towards the electrodes by electrostatic attraction.

Answer 8

INERT BACKGROUND

Question 9

how easily the electron cloud is distorted.

Answer 9

polarizable

Question 10

ELECTROACTIVE CURRENT GOES TO
ZERO

Answer 10

LIMITING CURRENTS

Question 11

Forms the basis of quantitative analysis.

Answer 11

LIMITING CURRENTS

Question 12

Most widely used electrode

Answer 12

DROPPING MERCURY ELECTRTODE (DME)

Question 13

Technique involving DME

Answer 13

POLAROGRAPHY

Question 14

Plot of current flowing in the cell as a function of the applied potential.

Answer 14

POLAROGRAM (POLAROGRAPHIC WAVE)

Question 15

Flows in the cell caused by the reduction of trace
impurities.

Answer 15

RESIDUAL CURRENT

Question 16

is analogous to the behavior of
a condenser

Answer 16

Charging effects

Question 17

Point reduction of electroactive species is initiated, the current increases with applied potential, until it leaves at a limiting value

Answer 17

Decomposition Potential

Question 18

Measurement of the current flow
produced by a Redox Reaction of the substance to be measured at an electrode at a fixed potential.

Answer 18

AMPEROMETRY

Question 19

measurement of current after
which a potential is applied to an electrochemical cell.

Answer 19

VOLTAMMETRY

Question 20

Measurement of differences in
current at a constant voltage

Answer 20

POLAROGRAPHY

Question 21

relates the diffusion
current and the concentration.

Answer 21

ILKOVIC EQUATION

Question 22

analyte is first deposited on a working
electrode, usually from stirred solution.

Answer 22

Initial Step

Question 23

analyte is redissolved or stripped from
the working electrode.

Answer 23

Second Step

Question 24

analyte is deposited by reduction then analyzed by oxidation from small volume mercury film or drop.

Answer 24

ANODIC STRIPPING METHODS

Question 25

analyte is electrolyzed into a small volume of mercury by oxidation and then stripped by reduction.

Answer 25

CATHODIC STRIPPING METHODS

Question 26

stripping of species spontaneously adsorbed on the surface of the working electrode/o needing a previous electrolysis step.

Answer 26

ADSORPTIVE STRIPPING VOLTAMMETRY

Question 27

used for determination of trace
metals in alloys, ultra-pure metals, minerals, foodstuffs,
beverages, and body fluids.

Answer 27

Polarography

Question 28

analytical reagent

Answer 28

AnalaR

Question 29

wider range of
application than polarography.

Answer 29

Amperometric titrations

Question 30

determined trace metals in
pharmaceutical products.

Answer 30

Polarography

Question 31

Pb and Fe testing (ASV)

Answer 31

Voltammetry

Question 32

determination of pO2,
glucose, peroxide

Answer 32

Amperometry