Overview

8th Grade Science

Chemical Reactions

10. Factors

10.2 Chemical Equations, Balancing equations

Master Chemical Equations & Balancing: Conservation of Mass Explained

Learners will explore how to write and balance chemical equations using coefficients, applying the Law of Conservation of Mass to every reaction type.

What You'll Learn

Balanced equations have equal atom counts on both sides always.

Coefficients adjust molecule amounts without changing compound identity.

The Law of Conservation of Mass governs all chemical equation balancing.

Five reaction types each follow distinct patterns for systematic balancing.

What You'll Practice

Students balance equations for synthesis, combustion, and decomposition reactions.

Practice questions test counting atoms using coefficients and subscripts correctly.

Learners identify whether equations satisfy the Law of Conservation of Mass.

Why This Matters

Balancing chemical equations is a foundational chemistry skill that underpins all scientific understanding of how matter transforms during reactions.

This Unit Includes

Practice exercises

Learning resources

Skills

Balancing Equations

Conservation of Mass

Coefficients

Reaction Types

Chemical Formulas

MA Curriculum Aligned