Chemical Reactions and Equations

Evidence of reactions, types, word and symbolic equations, conservation, balancing, and net ionic equations.

Intended level

Intermediate — after Nomenclature and Bonding.

Prerequisites

• chemical-names-formulas
• chemical-bonding

Ordered lessons

1. evidence types reactions
2. word symbol equations
3. conservation mass
4. balancing equations
5. net ionic equations
6. oxidation numbers redox

Related formulas and calculators

• $balancing-equation-method$ — see Formula: balancing-equation-method
• equation-balancer

Only links to real, published tools are shown. Placeholders are not linked.

Common misconceptions

• Balancing changes subscripts.
• All reactions go to completion.
• Spectator ions participate in net change.

Related resources

• Constants — sourced physical constants with version stamps.
• Laboratory Safety — PPE, hazards, RAMP.
• Glossary — definitions for key terms in this topic.
• Sources and Data — how sources are versioned and cited.

Curriculum mappings

This topic maps to external frameworks stored in src/content/curriculum/. Never implies official affiliation.

• AP Chemistry 1.1 / IB Chemistry 2.1 (see /curriculum/ap-chem-1-1 and file src/content/curriculum/ap-chem-1-1.md).
• Framework version and source URL recorded per mapping; review date 2026-08-21.

Review and source metadata

• Author: Chemistry Fundamentals Editorial Team (chem-team)
• Reviewer: Dr. Example Reviewer (chemistry reviewer — transparent placeholder, see /editorial-policy)
• Last reviewed: 2026-08-21
• Review due: 2027-08-21
• Sources: NIST Reference Placeholder (nist-2022, 2022-CODATA). Placeholder reference — replace with actual sourced reference per lesson.

Printable summary

Summary card (PDF) — coming soon — print styles preserve equations and tables.

Correction? See Corrections Policy and Contact.