3B Scientific Electrochemistry Kit - Manual (Page 24)

25
Experiment 9 - Measuring voltage Student instructions
Measuring the voltage for various electrolyte temperatures
Chemicals Hazard
symbols
R phrases S phrases Equipment
Meter
Silver nitrate 34-50/53 26-45-60-61 Electrodes:
2 Ag
Distilled water --- --- 2 Experiment cables
1 Beaker
1 Bunsen burner
1 Thermometer
2 Pipettes
Warning: Be careful when handling silver nitrate! Silver nitrate is corrosive!
Experiment procedure:
1. The 0.1 molar silver nitrate solution should be given to the students.
2. Assemble the battery block as described.
3. Put about 15 ml of 0.1 molar silver nitrate solution in a beaker and heat it to about 70-80° .
4. Fill one chamber of the battery block with 0.1 molar silver nitrate at room temperature and
put the hot 0.01 molar silver nitrate solution into the chamber opposite.
5. Insert one silver electrode into both electrolyte solutions, connect the electrodes to the meter and
read off the voltage.
Observation and evaluation:
Sketch of experiment set-up:
Observation during the experiment: