List Of 5 Chemical Reactions Lab

In this lab, a total of 9 reactions were complete, mixing 3 powders and 3 liquids. The powders were baking powder, baking soda, cornstarch. The liquids were water, iodine solution, and acetic acid. Of these experiments, 5 were chemical reactions and 4 were only physical changes. Of the powders, baking powder was the most reactive because it chemically reacted with all 3 liquids. Baking soda and cornstarch both reacted with 1 out of the 3 liquids. Baking soda reacted with acetic acid. Cornstarch reacted with iodine solution. Of the liquids, iodine solution and acetic acid were the most reactive because they both reacted with 2 out of the 3 liquids.Iodine solution reacted with baking powder and cornstarch. Acetic acid reacted with baking powder

Out of the 5 chemical reactions, there were 3 different indicators of a chemical reaction. These indicators are change in color, fizzing sound , and bubbling up. Two indicators are visual and one indicator is auditory. Change in color occurred in 2 out of the 5 chemical reactions. Fizzing sound occurred in 1 out of the 5 chemical reactions. Bubbling up occurred in 2 out of the 5 chemical reactions. One source of error could be cross contamination. Cross contamination means that different substances get mixed together, when they are not supposed to be. For example, if the experimenter uses the same scoop for both baking powder and cornstarch, some baking powder will get mixed with the cornstarch. Cross contamination can cause the substances we work with to become impure. Often times, the impure substance will have a different reaction than the pure substance. Another source of error is when the experimenter is rushing or not being observant. For example, when we mixed baking powder with water, most of the class did not wait long enough for the fizzing sound or did not notice the fizzing sound. It is very important to be patient and attentive in a science

The substance or substances can convert into different substance or substances as a result of a chemical reaction. Some common indicators of a chemical reaction we discussed in class are, color change, forming of new substances, and energy being released, A physical change is when the original substance is still the same substance after the change. However, the physical form of the substance can be changed. For example, paper can be ripped into small pieces, the paper is still the same material but the form of it is different. An example from one of the reactions is when baking soda and acetic acid were mixed. When baking soda and acetic acid were mixed, the mixture bubbled up and the foam rose up from a quarter of to the midpoint of the test tube. The mixture bubbling up suggest that gas is being released. Therefore, this is a chemical reaction. Another example of a chemical reaction is when cornstarch was mixed with water and iodine solution, After cornstarch was mixed water, the mixture was mixed with iodine solution. When the iodine solution was added, the mixture went from cloudy white to dark purple. This is a chemical reaction because we know that this color change was because one of the substance got diluted. The mixture was not diluted because when a substance gets diluted, the color gets lighter, however none of the three substances were purple. Therefore, this