Lecture 12 Flashcards
1
Q
Valinomycin (an antibiotic) is used in a _________ ion electrode
A
Potassium
2
Q
The accuracy of a calcium (Ca2+) electrode is____ a fluoride (F+) electrode.
A
Half of
3
Q
When analysing by direct calibration, ionic strength adjustment buffer (ISA) is added to all standards and samples to
A
bring them to the same ionic strength
4
Q
True or false
Potentiometry may be used to determine the end point of a titration.
A
True
5
Q
Gran’s plot of titration data is used when determining the endpoint of a
A
precipitation titration, complexometric titration
6
Q
2nd derivative (d2E/dV2) means what?
A
Changes sign at endpoint,
7
Q
1st derivative (dE/dV) means what?
A
Gives maximum at endpoint
