 This is a demonstration of the electrolysis of water. We have a solar cell that is producing about one and a half 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 and the oxygen being formed and the ratio at which they're produced. You can almost see that it's a two to one bubbles produced for hydrogen but we're going to continue this for about four or five minutes. Now you see the volumes are four milliliters in the oxygen side and eight milliliters on the hydrogen side. Now you see that we have ten milliliters of hydrogen and five milliliters of water. Now we have confirmation that indeed water is two parts hydrogen, one part oxygen and our molecular formula H2O we now have some evidence to demonstrate.