Electrolysis of Water

In Chemistry class today I completed the Electrolysis of Water Lab. I measured about 40 mL of distilled water in a 50 mL glass beaker. I mixed about a 1/2 teaspoon of Epson salt in the distilled water, until it was a clear solution. I then obtained two small lass tubes and filled the tubes to the top with the distilled water/Epson salt solution Then, I grabbed the small medicine plastic cup with the two tacks punctured on the bottom and placed it so the prongs of the tacks were submerged into the test tubes. Then I quickly flipped the tubes and plastic cup over, and filled the cup with the solution, and placed it over a D battery. The test tubes caught the oxygen and hydrogen that was being produced. We then retested the experiment by adding a pH indicator which turned the test tubes two different colors. The balanced chemical equation that was produced was;

2H2O --> 2H2 + O2

There were two qualitative indicators in this experiment;  you can visually observe twice the gas that was produced in the Hydrogen tube than the oxygen tube and the color difference due to the pH indicator that showed the difference in the composition. Yes, you can collect quantitative data to 'prove' the balanced reaction because the one tube produced twice as much gas than the other which can be proved in the equation. The equation showed that there is a ratio of 2:1 Hydrogen to oxygen which was proved by the results of the test tubes.

First Set without pH indicator

Second set with pH indicator

MY Particle Diagram