Saturday, September 11, 2010

Properties of Baking Soda

The item we selected for this experiment was baking soda. At first we couldn't come up with ideas because the only time we had ever used it was for baking. However, we finally came up with many creative experiments which probably would never happen in a normal household. We made many observations and tested the item with different typed of materials. Here are our results:

 Physical Properties:
  • the color of the baking soda was white
  • it is a solid
  • it has a powdery texture
  • it has no odor
  • it dissolves in water

          original baking soda                                                                           dissolved in water

Chemical Properties:
  •  First, we added 2 teaspoons of baking soda to 1/4 cup of vinegar. The mixture bubbled and rose and slowly, the baking soda dissolved in the vinegar. Then we put the mixture into a pan and heated it. This caused the mixture to immediately bubble.
  •  Next, we heated the baking soda by itself. For some reason we thought that something big would happen, but actually nothing happened. It stayed the same and had no chemical reaction.
  • Third, we mixed 1 teaspoon of baking soda with 1/4 cup of orange juice. I had a feeling that something would happen because orange juice has acid. The mixture started to make bubbles and it turned a light creamy orange color. Then we heated the mixture and it foamed, causing the mixture to rise. It also became a very light and fluffy liquid.

orange juice mixture                                                                                   heating  mixture
  • Then, we added 20 quirts of lysol disinfectant cleanser to a teaspoon of baking soda. It bubbled and foamed, and ti also rose. I turned into a white foamy material. After about 30 seconds, it slowly settled down and became a soapy liquid. 
                                                      lysol mixed with baking soda
  • Next, we added 1/2 cup of vanilla icing to 3 teaspoons of baking soda and heated the mixture. At first, the mixture started to turn into a liquid, but then it started burning. It slowly started to become a thick dark brown paste.
                                                         heating baking soda and icing
  • In addition, we added 2 cups of baking soda to 1/4 cup of vinegar, and we added and egg yolk to the mixture. This experiment scared us a little because it immediately foamed and almost overflowed. The egg slowly sunk to the bottom of the mixture while the foam kept rising. This was by far the best experiment. 
                                                    egg, vinegar, and baking soda mixture

As you can see, we had a very eventful chemistry experiment. It was fun and we understood chemical and physical properties a lot better after seeing some examples of them.