Powders Lab Report

In this experiment, four white powders were tested. After visually inspecting the powders, Powder A appeared to be white, lumpy, and possessed no lust, Powder B appeared to be white, soft, and lumpy, Powder C appeared to look smooth, white, and soft, and Powder D appeared to be lumpy, solid, and whitish-yellow. The materials that were utilized in this lab were cornstarch, baking powder, baking soda, powdered sugar, spot plate, scoopula, dropper, water, vinegar, iodine, toothpicks, and paper towels. The physical property that was observed was solubility, the ability of something to be dissolved, and the chemical property that was observed, reactivity, is the tendency of a substance to undergo chemical change. Knowing both chemical and physical properties of the substances is important because they give more information about the identities of the substances and back up observations

When water and vinegar were added to Powder A, the powder dissolved. This evidence shows that Powder A was soluble with vinegar and water. When iodine was added to Powder A, it reacted, changing color to orange/brown. Reactivity is a chemical property, it is the rate at which a substance inclines to undergo a chemical reaction. Powder B, when mixed with water, vinegar, and iodine, reacted by fizzing. But when iodine was added to it, it turned thick black. Powder C, on the other hand, when mixed with water and iodine, dissolved as well, therefore it is soluble, and reacted to vinegar by fizzing. When iodine was added to Powder C, it changed color to reddish orange. Finally, when Powder D was mixed with water and vinegar, it did not dissolve; therefore, it was insoluble, but when iodine was added, it changed color to greenish black. When liquids were added to the four powders, they reacted differently, and the transmutations that were distinguished availed with the identification of the