Stoichiometry: Particle Factory
See why 50g A + 50g B ≠ 100g product. Watch excess reactants pile up in the particle factory.
About this simulation
- What
- An interactive Chemistry simulation of Stoichiometry: Particle Factory.
- Who
- Designed for AP, IB, and A‑Level Chemistry students.
- How
- Runs in any modern browser — drag, adjust, and explore in real time.
Updated 2025-10-12
Key Concepts
Mole Ratios
Reactions occur in fixed mole ratios defined by the balanced equation. Mass must be converted to moles first.
Limiting Reagent
The reactant that runs out first and limits the amount of product that can form.
Theoretical Yield
Maximum amount of product that can form based on the limiting reagent.
Understanding Limiting Reagents
Stoichiometry is the calculation of the quantitative, mass-based relationships between reactants and products. It is the fundamental framework for predicting the outcome of chemical reactions based on atomic ratios.
The Limiting Reagent is the specific reactant that is exhausted first during a chemical process, thereby placing an upper limit on the Theoretical Yield of the resulting products.
Our interactive 'Particle Factory' visualizes these mole-ratio dynamics at the molecular level, demonstrating how excess reactants remain behind when the stoichiometric balance is not precisely aligned with the balanced equation.
Frequently Asked Questions
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