Interactive chemistry practice
Balancing Chemical Equations Practice
Build fluency with 159 curated equations. Balance each one yourself, diagnose atom-count mismatches, use hints sparingly, then study the full worked solution and visual atom-conservation check after success or answer reveal.
Learn the method step by step
Practice only after you understand why the coefficients change.
How to use the practice set
Balance on paper first. Use the checker to diagnose your work.
Choose a level
Start where the chemistry feels manageable, then move upward.
Enter coefficients
Use positive whole numbers. Leave a box blank when the coefficient is 1.
Check atom totals
The checker compares every element on both sides and shows mismatches.
Use a hint only when needed
Hints point to a strategy without immediately giving away the final ratio.
Rule: change coefficients only. Never change a formula subscript to force balance.
Want to balance an equation you enter yourself? This page is a curated practice bank. Use the Chemical Equation Balancer on CalcTypes for your own equation.
Practice workspace
Choose a level and balance the equation
What the checker is doing
It checks atom conservation, not answer memorization
H₂O counts as H = 2 and O = 1. Ca(OH)₂ counts as Ca = 1, O = 2 and H = 2.
3Ca(OH)₂ contains 3 Ca, 6 O and 6 H atoms.
Every element must match before the equation is accepted.
A final greatest-common-factor check keeps the conventional smallest whole-number coefficients.
This page practices balancing by inspection. Full acidic/basic half-reaction balancing is reserved for a separate advanced redox lesson.
Scientific provenance
Method and sources
The practice set uses curated reaction equations and a deterministic atom counter. It does not generate reactions or infer whether an arbitrary proposed reaction is chemically valid.