CP 3 Test: Reference Electrode Conversions

This test drills reference electrode conversions and temperature correction. Label every value with units and reference (V_CSE, V_SCE, etc.). Convert/normalize first, then interpret.

Instructions

• Assume standard reference values vs SHE at 25 °C as used on the formula pages.
• Round answers to the nearest 1 mV (or 0.001 V) unless stated otherwise.
• Do not mix reference scales. Convert first.

Questions

1. Convert -0.880 V_SCE to V_CSE.
2. Convert -0.850 V_CSE to V_Ag/AgCl(SW).
3. Convert -0.790 V_Ag/AgCl(SW) to V_CSE.
4. Convert -1.050 V_ZRE to V_CSE.
5. Convert -0.850 V_CSE measured at 5°C to the equivalent at 25°C. Use k = +0.9 mV/°C.
6. Convert -0.800 V_Ag/AgCl(SW) measured at 40°C to the equivalent at 25°C. Use k = −0.33 mV/°C.
7. A technician reports -850 mV without stating reference electrode. What is the minimum additional information required before applying a criterion?
8. A problem asks you to compare a reading taken with Ag/AgCl(SW) to a criterion stated for CSE. What should you do first?

Answer key