Reference Electrodes
What is S.H.E.?
What is an Ion-Selective Electrode?
An ISE which measures H+ concentration.
What is a pH electrode?
Voltage after 100mL of Ce 4+ added.
What is 1.458V?
Technique that uses a current to measure the amount of analyte.
What is coulometry?
The reference electrode abbreviated S.C.E.
Saturated Calomel Electrode
Inside an ISE between the selective membrane and the internal reference electrode.
What is filling solution?
What are Na+ ions?
Voltage after 25mL of Ce 4+ added.
What is 0.525V?
Technique that keeps the analyte from oxidizing or reducing an interfering species.
What is constant potential electrolysis (CPE)?
A sample is measured at 1.363V vs. SHE. What is the voltage vs. SCE?
1.119V
Calculate the constant that goes into the ISE equation.
0.288
The reference electrode inside a pH electrode.
What is the Ag/AgCl electrode?
Voltage after 50mL Ce 4+ added.
What is 0.9915V?
How much charge (C) passed through the solution?
54.9 C
A sample is measured with a voltage of -0.102V vs. Ag/AgCl. What is the voltage vs. SCE?
-0.146V
What is the activity of Zn2+ in the unknown?
9.694x10-5 M
The x-intercept of a Gran plot.
What is Ve?
Voltage after 10mL Ce 4+ added.
What is 0.489V?
How many moles of electrons were generated?
5.69x10-4 mol e-
A sample is measured with a voltage of 0.256 V vs. SCE. What is the voltage vs. Ag/AgCl?
0.300V
What is the activity of Li+ in the contaminated sample?
0.00228 M
Measuring at least one buffer above expected sample pH and one below.
What is proper pH electrode calibration?
Voltage after 70mL Ce 4+ added.
What is 1.434V?
How many grams of O2 gas were produced?
0.0091 g