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ZingPath: Chemical Reactions

Writing and Balancing Chemical Equations

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Chemical Reactions

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Lesson Focus

Writing and Balancing Chemical Equations


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You will write and balance chemical equations.

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Now You Know

After completing this tutorial, you will be able to complete the following:

  • Identify the reactants and products in a chemical equation.
  • Determine the number of atoms of each type of element in a molecule and in a chemical equation.
  • Differentiate between decomposition and synthesis reactions.
  • Describe a double replacement reaction as a reaction in which atoms switch places to form two new compounds.
  • Balance chemical equations.

Everything You'll Have Covered

In order for a chemical reaction to occur, mass needs to be conserved as reactants are transformed into products. This means the atoms that start a reaction must end the reaction. The mass of these atoms is the same on both sides of the equation because the amount of atoms on both sides of the reaction is equal. This is shown in a chemical equation. A balanced chemical equation represents the substances involved in the reaction. The amounts are balanced with the use of coefficients. Balancing the equation ensures that the law of conservation of mass is upheld.

Tutorial Details

Approximate Time 45 Minutes
Pre-requisite Concepts Learners should know the concepts of writing chemical formulas and chemical reactions. They should also be familiar with the concepts of the law of conservation of mass and with states of matter.
Course Chemistry
Type of Tutorial Concept Development
Key Vocabulary balancing chemical equations, chemical formulas, coefficient