Figure 1 Standard tests for 3 common gases. The bag bubbled, got cold, and turned from blue to red. Students utilize reading, writing, and speaking strategies in order to develop scientific literacy. Soak the steel wool in the vinegar. Do not touch the dish until 5 min after the flame extinguishes.
. Looks like a cereal bowl. It is made of sodium bicarbonate which is ionically bonded and reacts when in the presence of an acid. Have the students turn to their unit plans and silently read the skill. If you are asked to name the main 4, 5 or 6 types of , here is how they are.
Bubbles all around the penny Lemmon and penny 1. Dump a plastic spoon full of baking soda into half of the petri dish. Pre-lab Please identify whether the following chemicals are considered an acid or base: a. For example, the student notes that there were bubbles formed, but does not indicate that this is a sign of gas production. Results Reaction Appearance of Reactant s , Evidence of Chemical Reaction and Properties of Product s 1 Manganese black and thin. Setup and Materials: The Reaction: Student Work: The student above demonstrates both mastery and misconceptions.
No food or beverages of any kind should be brought in to the lab. Then, the student mentions that there was a temperature change but does not back it up with an observation from the lab or indicate that the temperature increased. Student Work: In the first question, this student demonstrates some of the challenges that many students have in this lab. For example, pretend a student watched a reaction in a zip lock bag. There are several different types of chemical reactions and more than one way of classifying them. It is an excellent idea to wash our hands anytime that you think you may have contaminated them with a chemical.
Rip a small piece of steel wool 2. Last, when noting the changes in the properties from the reactants to the products, please be sure to note at least one physical property that changed and one chemical property that changed. Classify each reaction using the information provided in the Background section. Some students have the misconception that in physical reactions no properties change. There was a secondary reaction that took place.
The Steel wool is turning brown. Therefore, this also means that students analyze and interpret data to provide evidence to describe phenomena. To close, I have students complete this exit slip. Acetic acid and lithium hydroxide solution produce water and aqueous lithium acetate. Each lab group requires the following items to perform all the activities. Thus, the student determined that it was a chemical reaction.
Cut out a small chunk go the potato 2. Thus, they can realize that macroscopic patterns are related to the nature of microscopic and atomic-level structure. Which type of chemical reaction occurred in experiment 3? Name each of the following chemical formulas: a. When making these claims, it will be important that you cite qualitative as well as quantitative data. Clean any dirty glassware before putting it in the drawer. What evidence can show how the physical and chemical properties of the substances change? Sulfur dioxide gas reacts with oxygen on a platinum catalyst surface to produce sulfur trioxide gas.
Bubbles will begin to rise to the top of the beaker. A great example of this can be shown in the students work below. Never leave your experiment unattended and do not interrupt other workers. Take the pure distilled white vinegar 4. Shake off all the extra vinegar. Students analyze evidence and property changes that allow them to distinguish between chemical and physical reactions.