About This Chapter
WEST Chemistry: Stoichiometry & Chemical Equations - Chapter Summary
Watch our expert instructors in this series of lesson videos as they explain the concepts of chemical equations, the mole, relationships between reactants and products of chemical reactions, and calculations of stoichiometry. Once you've finished your review of these lessons you should have a better understanding of:
- Balancing chemical equations
- Uses of the mole concept and mole-to-mole ratios & calculations
- Calculations for relative quantities in a gas or solution
- Calculating excess reactants
- Limiting reactants and calculating reaction & percentage yields from a limiting reactant
- Percent compositions and empirical formulas
- Determining chemical formulas and calculating mass-to-mass ratios
Reinforce your understanding of this previously learned material by watching entertaining videos and taking the quizzes that follow them. The videos are short, so your study times can be conveniently scheduled throughout your day. Your questions about stoichiometry and chemical equations can be submitted to our instructors.
WEST Chemistry: Stoichiometry & Chemical Equations Objectives
If you are wanting to add the chemistry endorsement to your teaching certificate in the state of Washington, you will need to score at least a 240 on the Washington Educator Skills Tests-Endorsements (WEST-E): Chemistry exam. This computer-based certification exam involves completing a series of 110 multiple-choice questions in a two-hour and 30-minute testing session. You can expect 12% of these questions to belong to the content domain of Stoichiometry and Solutions, including some questions about the mole concept and calculations of stoichiometry.
1. Chemical Reactions and Balancing Chemical Equations
In this lesson, you'll learn how to balance a chemical reaction equation using the conservation of matter law. You'll also learn how to write both word and formula equations, what the subscripts after a letter mean and what the numbers in front of compounds mean.
2. Avogadro's Number: Using the Mole to Count Atoms
How do we move from the atomic world to the regular world? Because atoms are so tiny, how can we count and measure them? And what do chemists celebrate at 6:02 AM on October 23rd each year? In this lesson, you will be learning how Avogadro's number and the mole can answer these questions.
3. Mole-to-Mole Ratios and Calculations of a Chemical Equation
Learn what a mole ratio is and how to determine and write the mole ratio relating two substances in a chemical equation in this video lesson. Also, learn to make mole-to-mole calculations and solve problems involving moles of substances.
4. Mass-to-Mass Stoichiometric Calculations
Learn how to set up and make mole to mass, mass to mole and mass to mass stoichiometric calculations. Learn how the ratios of moles helps you compare and make calculations. Learn how to relate mole ratios to molar mass.
5. Stoichiometry: Calculating Relative Quantities in a Gas or Solution
In this lesson, learn about molar volume and how to set up and make stoichiometric calculations with gases. Then learn about solution stoichiometry and how to make stoichiometric calculations with solutions.
6. Limiting Reactants & Calculating Excess Reactants
In this lesson, you'll learn what limiting reactant and excess reactant mean and how to determine which reactant is limiting in a chemical reaction when given the amount of each reactant. You'll also discover how to calculate the amount of product produced.
7. Calculating Reaction Yield and Percentage Yield from a Limiting Reactant
Learn what the theoretical yield, actual yield and percent yield are. Given the limiting reactant, learn how to calculate the theoretical reaction yield, which is also known as the ideal reaction yield and percentage yield.
8. Calculating Percent Composition and Determining Empirical Formulas
Learn the difference between the empirical formula and chemical formula. Learn how to calculate the percent composition of an element in a compound. Learn how, if given a percent composition, to determine the empirical formula for a compound.
9. Hydrates: Determining the Chemical Formula From Empirical Data
Learn the definition of a hydrate and an anhydrate in this lesson. Discover how, when given experimental data, you can determine the formula of a hydrate by following simple steps that include finding the moles of hydrate and anhydrate and comparing the two to write the formula.
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Other chapters within the WEST Chemistry (306): Practice & Study Guide course
- WEST Chemistry: Properties of Matter
- WEST Chemistry: Atomic Structure
- WEST Chemistry: Liquids & Solids
- WEST Chemistry: Gases
- WEST Chemistry: Thermodynamics
- WEST Chemistry: Chemical Bonds
- WEST Chemistry: Inorganic & Organic Compounds
- WEST Chemistry: Chemical Reactions
- WEST Chemistry: Understanding Equilibriums
- WEST Chemistry: Redox Reactions & Electrochemistry
- WEST Chemistry: Acids & Bases
- WEST Chemistry: Properties of Solutions
- WEST Chemistry: Basics of Science
- WEST Chemistry: Interdisciplinary Relationships in Science
- WEST Chemistry Flashcards