Chem Lab 1 Essay

Using a pipette, I added two drops of one chemical with two drops of another chemical and observed the effects of each reaction. I would assume that the sample solution is vinegar because phenolphthalein turns pink in the presence of an acid. D. My interpretation is that the fifth sample did not contain starch. E. I would assume that the yellow flavor is basic and the blue flavor is acidic. F. I would drop a few drops of potassium iodide into the tonic. If a yellow precipitate is formed, then I know there is lead in the hair tonic. Conclusion: Initially this experiment was confusing because the Nasal and SKI were not reacting with the starch as expected.

I realized that the SKI was not the robber because it formed the precipitate with BP(NON)2 as expected; therefore, I deduced the Nasal supplied by labial was not reacting properly. After determining that Nasal was household bleach, I went to the laundry room, got some bleach, performed the tests again and obtained the expected reactions. That was very satisfying! Also, Vive recently gone on a health kick, and identifying whether a food contains starch is important to me now because I am trying to cut back on my starch intake to lose weight. Perhaps I should take the labial to the restaurant!