Procedure Part 2:

We will now connect our hydrogen generator and measure the starting temperature of the water, and the actual voltage across the electrodes.

  Materials / Part 1 / Part 3 / Main Page

 

Step 1:

• Mix about two liters of water with the ½ cup of soda.
• Slowly pour the water into the large pop bottle, covering the tops of the small bottles. Open the air hose valves and allow the air in the small pop bottles to escape. When the small pop bottles are full of water, stop adding water.
• Measure the temperature of the water in the apparatus and record the temperature.

 

Next>

 

Step 2:

• Power up the Mini-lab Trainer and set to +12V. Notice that gas bubbles immediately begin to form on the electrodes in the small bottles.
• Allow the process to run until the water above the electrodes has been displaced by hydrogen and oxygen in the small bottles.

 

 

Step 3:

• Use your digital multimeter to directly measure the voltage between each electrode. Record the value.