ANACHEM QUIZ (MODULE 12)

Question 1

Used to find the concentration of solute in a solution.

Answer 1

potentiometry

Question 2

potential is measured under the conditions of no
current flow.

Answer 2

potentiometry

Question 3

are based on measuring the potential of electrochemical cells without drawing appreciable current

Answer 3

potentiometric method of analysis

Question 4

have been used for locating end points in titrations.

Answer 4

potentiometric techniques

Question 5

an electrochemical
transducer capable of responding to given ion

Answer 5

ion selective electrode

Question 6

selective and sensitive method, not specific.

Answer 6

ion selectice electrode

Question 7

w/o sample dilution

Answer 7

direct ISE

Question 8

w/ sample dilution

Answer 8

indirect ISE

Question 9

Half-cell having a known electrode potential that remain constant at constant temperature and is independent of the composition of the analyte solution.

Answer 9

reference electrode

Question 10

has a potential that varies in a known way with variations in the concentration of an analyte.

Answer 10

indicator electrode

Question 11

it responds rapidly and reproducibly to changes in the concentration of an analyte ion (or group of
analyte ions.).

Answer 11

indicator electrode

Question 12

three types of indicator electrode

Answer 12

1. Metallic
2. Membrane
3. Ion-sensitive field effect transistors

Question 13

use a pH electrode to monitor the change in pH during the titration

Answer 13

potentiometric titrations

Question 14

used for or determining the equivalence point of an acid-base titration.

Answer 14

potentiometric titrations

Question 15

possible for acid-base, complexation, redox, and precipitation titrations, as well as for titrations in aqueous and nonaqueous solvents.

Answer 15

potentiometric titrations

Question 16

provide a rapid and convenient method for determining the activity of a variety of cations and anions.

Answer 16

direct potentiometry

Question 17

is remarkably versatile tool for the measurement of pH under many
conditions.

Answer 17

glass/calomel electrode system

Question 18

It can be used without interference in
solutions containing strong oxidants, strong reductants, proteins, and gases;

Answer 18

glass/calomel electrode system

Question 19

the pH of viscous or even semisolid
fluids can be determined. Electrodes for special applications are available.

Answer 19

glass/calomel electrode system

Question 20

permits the measurement of pH inside a living cell

Answer 20

microelectrodes

Question 21

for insertion in a flowing liquid stream to provide a continuous monitoring pH

Answer 21

rugged electrodes

Question 22

that can be swallowed to measure
the acidity of the stomach contents

Answer 22

small electrodes

Question 23

the ordinary glass electrode becomes somewhat sensitive to alkali metal ions and gives low readings at pH values greater than 9.

Answer 23

alkaline error

Question 24

values registered by the glass electrode tend to be somewhat high when the pH is less than about 0.5.

Answer 24

acid error

Question 25

may cause erratic electrode performance.

Answer 25

dehydration