Stoichiometry is the study of the mass amounts of substances involved in a chemical reaction, expressed by a balanced chemical equations.

Students discover stoichiometry by looking at the mass change between products and reactants during a simple reaction with vinegar and baking soda. After developing the math necessary to understand the reaction, they repeat it, trying to increase the efficiency of the reaction. no balances in the laboratory will measure moles calculations must be used.

How are chemical reactions represented?

How are chemical equations written?

Practice problems balancing chemical equations

Use molecular model to create reactants and the products by balancing the atoms need to make same number of atoms on both sides of equation

determine correct mole ratio

Voicethread balancing chemical equations

determine mass of reaction substances

Quiz balancing chemical equations and determining mole ratios

Lab investigation: What is stoichiometry? • How can we use stoichiometry to figure out how much of a product was created? Students will determine mass of reactants and products to WebQuest balancing chemical learn that mass is conserved during equations online a chemical reaction.

How are chemical equations balanced?

How can we calculate the amounts of each chemical needed and produced in a chemical reaction?

Why is it important to know the amounts of reactants and products?

calculate theoretical yield What is the theoretical yield?

How is percent yield used to determine reaction efficiency?

Practice problems stoichiometry mass to mass and moles to mass using limiting reactant to calculate theoretical yield

measure actual yield of reaction

Performance- measuring actual yield of chemical reaction.

use theoretical yield and actual yield and calculate percent yield

Practice problems determining percent yield

design an efficient chemical reaction proving efficiency by calculating percent yield

Quiz stoichiometry - word problems determining limiting reactant and masses of reactants and products

know key terms of stoichiometry

Quiz calculating percent yield and vocabulary

How is theoretical and actual yield used to determine percent yield?

Balancing Chemical equation voicethread

Lab: Do the principles of stoichiometry really work? How do you use stoichiometry to determine the percentage yield of a reaction? In this lab students will use actual yields of determined mass in chemical Lab: Using you learned reaction to what determine percentfrom yield previous two labs design an efficient and reaction efficiency. reaction using stoichiometry to determine amounts of reactants.

Do chemists follow a recipe when mixing chemicals? How can an efficient reaction be designed?

What formulas are needed to determine mass of reactants needed for an efficient reaction to eliminate waste?

Review problems quantitative stoichiometry

Stoichiometry jeopardy

What key terms will be used to explain your design for an efficient reaction?

Big Idea

Understanding

Write chemical equation and balance correctly

Essential Question

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able to use the correct formulas and mole ratios to calculate mass of reactants or products in reaction.

End of Learning Module Test

Test: Stoichiometry