This is a demonstration of the electrolysis of water. We have a solar cell that is producing about 1.5 volts of current and it's passing through our electrolysis device. In this electrolysis, we fill both containers to the zero mark and now we're going to start our reaction and I want you to watch the hydrogen in the oxygen being formed and the ratio at which they're produced. You can almost see that it's 2 to 1 bubbles produced for hydrogen but we're going to continue this for about 4 or 5 minutes. Now you see the volumes are 4 milliliters in the oxygen side and 8 milliliters on the hydrogen side. Now you see that we have 10 milliliters of hydrogen and 5 milliliters of water. Now we have confirmation that indeed water is 2 parts hydrogen, 1 part oxygen and our molecular formula H2O, we now have some evidence to demonstrate.