How to use: Two types of reactant particles bounce around the
container. When an A and a
B particle collide with enough energy,
they react — you'll see a green flash. The graph on the right counts reactions over time.
Try raising the temperature. Then try adding more particles. Then try the catalyst.
Which one changes the rate the most?
Notice: every factor makes the graph steeper. Temperature does it because particles move faster and hit harder. Concentration does it because there are more particles to hit. A catalyst does it by making each collision more likely to succeed — without changing the particles at all.