LeChatelier's Principle Mini-Lab
Jenna Chase and Ben Deru
Activity 1: Solubility of Carbon Dioxide
When carbon dioxide dissolves in water, the reaction shifts to the right to increase the moles of gas on the other side of the reaction. When the pressure was decreased the pH went up and the color changed to a darker shade of green. The decreasing pressure also created bubbles.
Activity 2: Solubility of Magnesium Hydroxide
When magnesium is dissolved in water it separates into magnesium and hydroxide. In this activity, we added hydrochloric acid to the hydroxide and universal indicator solution. The solution changed colors as more acid was added. The solution started purple and then it changed to pink, blue, and then back to pink. The solution is kind of clear because we ran out of OH and water was added. The reaction shifted to the right because a reactant was added so it shifted right to make more product.