Dry Substances Lab Report

In this lab, we tested what would happen to the four substances if we mixed each of the substance with four other liquid substances. The material we used were baking powder, baking soda, corn starch, sugar, stick, water dropper, ice tray, water, vinegar, and iodine solution. First, I poured each of the dry materials into each slot on the ice tray by the recommended amount as said on the sticks. Then, one at a time I used the water dropper to have water droplets fall into the baking powder. After I mixed the baking powder and water together I observed what happened to the mixture. For the remaining dry substances, I did the same thing. Next, came the vinegar where I mix the vinegar with the four substances. For this, I also observed what has happened.

Then, we observed. The learning target that we were testing was I can distinguish physical and chemical changes. When I observed the dry substances with water mixed I noticed that they all dissolved within the water. Next, when the vinegar was mixed I observed fizzing occurring in all of the substances except for corn starch. Finally, the dry substance mixed with iodine solution all changed colors which indicate that it is a chemical change. A physical change in the experiment we did was the substances dissolving because nothing has been created. Errors that might exist are when we were deciding the amount of substance to put in the tray because the stick didn’t provide a perfect amount of substance we should put in the tray. Another error that might exist is using contaminated sticks. Two new things I have learned in this experiment is that iodine can change the color of the substances and two changes of