Tune the numbers until both sides match, then push on to the limiting reagent.
Was this fun?
How to play
Adjust the coefficients in front of each species until the atom counts on both sides of the reaction are equal. Then take it further: identify the limiting reagent and predict the yield.
Use the steppers to set each coefficient up or down
Balance every element so the totals match left and right
Find the limiting reagent that caps the reaction
Work out the yield to complete the round
Game modes
Daily equation, the same one for everyone today
New Practice for fresh equations
Controls
Desktop: click the plus and minus steppers to set coefficients; a hint can reveal one
Phone & tablet: tap the steppers to adjust coefficients
Tips & strategy
Balance the most complex molecule first, then clean up single elements last
Save free elements like oxygen and hydrogen for the final adjustments
Whole-number ratios only, scale the whole equation down if everything is even
What you'll learn
Balance is a chemistry puzzle about balancing equations, juggling limiting reagents and yield so atoms are conserved on both sides.
Skills: balancing chemical equations, conservation of mass, limiting reagents, stoichiometry
Best for: roughly grades 9–12 (ages 14+)
For parents & teachers: a focused workout on a skill students often struggle with.
About Balance
Balance is a chemistry puzzle about balancing equations, limiting reagents and yield. It's an original, free browser game built in-house for PlayPendium.
A free, original browser game on PlayPendium. No download, no install.
