About Reactants, Products and Leftovers
Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients. Do the same with chemical reactions. See how many products you can make with different amounts of reactants. Play a game to test your understanding of reactants, products and leftovers. Can you get a perfect score on each level?
How to play Reactants, Products and Leftovers
Everything is hands-on: drag, click and experiment — the simulation reacts instantly. Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients.
Questions & answers
- What is Reactants, Products and Leftovers?
- Reactants, Products and Leftovers is a free interactive simulation from PhET Interactive Simulations (University of Colorado Boulder) that you can play right in your browser on crumble.lol — no downloads and no sign-up. Create your own sandwich and then see how many sandwiches you can make with different amounts of ingredients. Do the same with chemical reactions.
- What can kids learn from Reactants, Products and Leftovers?
- It helps kids explore: recognize that atoms are conserved during a chemical reaction. use concrete everyday experiences (such as making sandwiches) to describe the what a limiting reactant means in chemical reactions. identify the limiting reactant in a chemical reaction. predict the products and leftovers after reaction, based on the quantities of reactants and ratios of molecules in the balanced chemical equation. predict the initial amounts of reactants given the amount of products and leftovers using the concept of limiting reactant. translate from symbolic (chemical formula) to molecular (pictorial) representations of matter.
- What age is Reactants, Products and Leftovers good for?
- It is designed for middle school (roughly ages 10–14) up to university, and curious kids outside that range can absolutely enjoy poking around it too.
- Is Reactants, Products and Leftovers free to play?
- Yes — Reactants, Products and Leftovers is completely free on crumble.lol and runs fully in your browser on computers and tablets.