Acid rain - With this experiment we want to show how gases that are dissolved in water will turn the water into an acid.

... Acid Rain Investigations Date of experiment: March 20, 2003 Written by: Berit Nielsen 2.i Partners: Mary Rasmussen Dmitri Kern Introduction With this experiment we want to show how gases that are dissolved in water will turn the water into an acid. Materials and method For the experiment we used the following: Medicine dropper demineralised water 2 beakers with lid bromothymol blue graduated cylinder 2 test tubes matches lead nitrate, Pb(NO3)2 First we added a few drops of the indicator, bromothymol blue, to 10 mL of dem. water in a test tube until the water became slightly blue. Then we placed a match in a clean beaker and lighted it. We covered the beaker with a lid. When the match had burned out we added bromothymol blue solution from the test tube to the beaker. Afterwards we shook the beaker to make sure it mixed. In the cupboard we heated a spatula of lead nitrate in a test tube. We observed how the lead nitrate decomposed to lead(II)oxide, PbO, and nitrogen dioxide, NO2.

want to read more? →