Transcript
![Page 1: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/1.jpg)
Lecture 23Potentiometry, Ion-Selective Electrodes.
Reading: Ch. 14
![Page 2: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/2.jpg)
Outline
1. Potentiometry (15-1)
2. Reference Electrode (15-1)
3. How ion-selective electrodes work (15-4)
4. Glass pH-electrode (15-5)
![Page 3: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/3.jpg)
![Page 4: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/4.jpg)
![Page 5: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/5.jpg)
![Page 6: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/6.jpg)
Junction potential
![Page 7: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/7.jpg)
+ _
![Page 8: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/8.jpg)
How do ion-selective electrodes work?
distance
activ
ity o
r co
ncen
trat
ion
![Page 9: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/9.jpg)
![Page 10: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/10.jpg)
[ ]pb,Na
potHNapb,H
0 aaln ++ ++= KF
RTEEPB
Nikolsky equation:
![Page 11: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/11.jpg)
![Page 12: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/12.jpg)
![Page 13: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/13.jpg)
![Page 14: Lecture 23 Potentiometry, Ion-Selective Electrodes. Reading: Ch. 14sites.science.oregonstate.edu/chemistry/courses/ch421... · 2006-11-21 · Potentiometry, Ion-Selective Electrodes](https://reader034.vdocuments.us/reader034/viewer/2022042606/5f87cae587f2987eba5e2931/html5/thumbnails/14.jpg)