Chapter 17

Question 1

The voltage required to overcome the activation energy for a reaction at an electrode

Answer 1

Overpotential

Question 2

Voltage needed to overcome electric resistance of the solution in the electrochemical cell when a current is flowing

Answer 2

Ohmic potential

Question 3

One that can be oxidized or reduced at an electrode

Answer 3

Electroactive species

Question 4

Their potentials are easily changed when small currents flow

Answer 4

Polarizable

Question 5

The one at which the reaction of interest occurs

Answer 5

Working electrode

Question 6

Used to measure the potential of the working electrode

Answer 6

Reference electrode

Question 7

Analyte is quantitatively deposited on an electrode by electrolysis

Answer 7

Electrogravimetric analysis

Question 8

Total number of electrons used for a reaction tells us how much analyte is present

Answer 8

Coulometry

Question 9

Electric current is proportional to the concentration of analyte

Answer 9

Amperometry

Question 10

A protein that catalyzes a biochemical reaction; increases the rate of reaction by many orders of magnitude

Answer 10

Enzyme

Question 11

A protein that bonds to a specific target molecule (antigen)

Answer 11

Antibody

Question 12

Transports electrons between the analyte and the working electrode

Answer 12

Mediator

Question 13

A collection of techniques in which the relation between current and voltage is observed during electrochemical processes

Answer 13

Voltammetry

Question 14

Due to redox reaction at the electrode

Answer 14

Faradaic current

Question 15

Due to electrostatic attraction or repulsion of ions in solution and electrons in the electrode

Answer 15

Charging current

Question 16

Measures traces or water in transformer oil, solvents, foods, polymers, and other substances

Answer 16

Karl Fischer titration