Baking Soda Stoichiometry Lab Answer Key For Teachers

Name: Lab Partners: Date: Lab # 23: Decomposition of Baking Soda Stoichiometry Chemistry 1 Background: Due to the widespread use of sodium bicarbonate, commonly called baking soda, in many food products, Fill & Sign Online, Print, Email, Fax, or Download. What is the gas produced in the chemical reaction between vinegar and baking soda? What they did not consider was that the contents of their test tube were going to still be really hot. The use of stoichiometry to generate sufficient evidence that will support their eventual conclusion will be the meat of their argument. Point out that the type and number of atoms in the reactants and in the products are exactly the same.

1. Baking soda stoichiometry lab answer key for teachers
2. Decomposition of baking soda lab answer key
3. Stoichiometry lab answer key
4. Baking soda stoichiometry lab answer key slides

Baking Soda Stoichiometry Lab Answer Key For Teachers

When they were finished, each group was required to produce a whiteboard that resembled the following structure: Figure 2 - Whiteboard Template. Students will analyze the outcome and compare the presence of the gases in the container and make determinations about the densities of each. The chemical formula for a substance is unique to that substance and defines what it is. Get the free baking soda stoichiometry lab answer key form. During our reactions unit, they had learned about testing for certain gases using a flame test. Every test should be conducted the same way. Some students will realize that the later trials did not produce proportionally higher changes in pressure because there was not enough sodium bicarbonate to react with all of the citric acid. Students need to experience the fact that science is not just a linear process driven by knowing exactly what to do and exactly what to expect every step of the way without hiccups. Plan and conduct an investigation individually and collaboratively to produce data to serve as the basis for evidence, and in the design: decide on types, how much, and accuracy of data needed to produce reliable measurements and consider limitations on the precision of the data (e. g., number of trials, cost, risk, time), and refine the design accordingly. As a demonstration, combine vinegar and baking soda to show students the chemical reaction described in the equation. Add 1 drop of detergent solution and swirl gently to mix. Though some of the products can be easily determined qualitatively, stoichiometry will need to be applied when trying to identify the solid product that remains. Explain to students that another way of saying that no atoms are created or destroyed in a chemical reaction is that mass is conserved. In this experiment you are going to prepare table salt (NaCl, sodium chloride) from baking soda (NaHCO3, sodium bicarbonate or sodium hydrogen carbonate).

Decomposition Of Baking Soda Lab Answer Key

They will also be able to explain why simply adding more and more of one reactant will eventually not produce additional products. The appearance of condensation in the dry test tube is a sign that there is still some water left in your sample test tube. The vinegar is poured in afterwards to cause better mixing of reactants. This might work for a while, as long as there is extra vinegar, but eventually there would be no atoms left of vinegar to react with the extra baking soda, so no more carbon dioxide would be produced. I also included it in the Supporting Information below. In this experiment from our Essential Chemistry Laboratory Investigations Manual, students perform multiple trials, keeping the amount of baking soda (sodium bicarbonate, NaHCO3) constant while increasing the amount of citric acid (C6H8O7). How many of each type of atom are there in the compound sodium bicarbonate? 4) Developing an argument from evidence.

Stoichiometry Lab Answer Key

To the students, this reactant is a complete curveball. In fact, the agreement with that hypothesis is quite strong, and the agreement with the supposedly correct hypothesis is terrible. Add the amount of baking soda your group agreed on to the empty graduated cylinder. Asking questions and defining problems in grades 9–12 builds from grades K–8 experiences and progresses to formulating, refining, and evaluating empirically testable questions and design problems using models and simulations. What are the criteria (specifications) for a successful solution? Which atoms make up a molecule of acetic acid (vinegar)? For the first time, they actually needed to consider questions such as: Figure 1- Example questions from the ADI book. Graduated cylinder (100 mL). Review the concept that mass is conserved in a chemical reaction. Baking soda in a cup. This is an important concept in chemistry: In a chemical reaction, all the atoms in the reactants end up in the products. Select Done in the top right corne to save the file. Citric acid interacts with the sodium bicarbonate similar to the way the acetic acid in vinegar interacts with sodium bicarbonate. However, our students are novices.

Baking Soda Stoichiometry Lab Answer Key Slides

Stoich lab answer key. As novices, they have no idea how to confidently predict the products of such a reaction. This really threw them off and I could sense the frustration from several groups because, for once, I was not spoon feeding them every single detail of each step in the procedure. While most groups executed the experiment without major flaws, I was reminded of the importance in giving them experiences that provide opportunities for failure and reflection in the lab. Engineers must be able to ask probing questions in order to define an engineering problem.

Doing so resulted in the reaction seemingly taking forever to complete. 3 carbon atoms, 5 hydrogen atoms, 5 oxygen atoms, and 1 sodium atom. They have made the connection that something will run out and stop the reaction! Students will observe chemical change and investigate real-world connections to this lab. Don't worry if you haven't covered molarity yet - let the students know that for 1000 mL of solution, there are 10. Editor's Note: Readers may be interested in reading a Pick about Argument-Driven Inquiry in Chemistry posted Chad Bridle. Even though this feature is a hallmark trait of every ADI-themed lab, it was still a relatively new experience for me. The theoretical amount of NaCl that can be produced from a weighed amount of NaHCO3 and excess HCl is given by: The percent yield is given by: USE OF LABORATORY BALANCE.