Natural Indicator: Vanilla Extract
Will Kruse, Marko Perovich, David Sigler, Adam Colombus
***There was no need to prepare our natural substance (Vanilla extract)
1.Get test tubes with all 7 pH values
2. Add 20 drops of indicator to each pH value. You will notice that as the color gets darker it goes from an acid to a base.
3. Gather 4 clear and colorless household items and put about an inch of each substance into a test tube.
4. Add distilled water to the baking power so that the chemicals can dissociate and you could test for a pH value.
5. Put 20 drops of the indicator into each substance.
6. Match up the colors to the pH standards you've already set up to the experimented household items tested.
pH- 1, 3, 5, 7, 9, 11, 13
Substances- Baking Powder, Shampoo, Hydrogen Peroxide, Vinegar
Substances with pH- Baking Powder (7), Shampoo (11), Hydrogen Peroxide (5), Vinegar (5)
Colors for acids-
1- Light Orange
5- Dark Orange
Colors for bases-
9- Dark Red Orange
Indicator better at detecting acids or bases?
-The indicator was better at detecting bases because the colors between each pH level were more easier to differentiate between within the bases than in the acids.
Problems with natural indicator and judging hp
-The colors of the acids were very similar, making it difficult to judge the pH.
What would we do differently?
-Next time, we would use a different aqueous solution as a household substance instead of baking powder. Although we dissolved it in water before testing the pH, another household item would have been easier to use and find a more accurate pH.