Which condition did you change?
Labs / Chemistry
Reaction Rates
Red A particles and blue B particles bounce around a box. When an A and a B slam together hard enough to clear the activation energy, they fuse into a purple product and vanish from the mix. Raise the temperature, add more particles, or stir the box with your pointer and watch the reactant curve fall.
Labs / Chemistry / Reaction Rates
Reaction Rates
Red A particles and blue B particles bounce around a box. When an A and a B slam together hard enough to clear the activation energy, they fuse into a purple product and vanish from the mix. Raise the temperature, add more particles, or stir the box with your pointer and watch the reactant curve fall.
Why it matters
Why explore this?
Chemistry connects events too small to see with changes we can measure. This model helps you link particles, energy, and conditions to an observable result.
Explore
Try the model
reactants 60rate 0 /s
Investigate
Questions to test
Predict first, try it in the model, then use what you observe to answer.
What to try
- Crank the temperature up. Why do the reactants disappear so much faster when the particles move quicker?
- Slide the activation energy to the top. What happens to the reaction rate when almost no collision is hard enough to react?
- Double the concentration. Does packing in more particles change how often A actually meets B?
- Watch the rate readout as the run goes on — why does it slow down even though the temperature never changed?
- Set the activation energy to zero. Does every single collision now react, and how quickly does the box turn purple?
Explain
Make sense of what happened
Describe what happened at the particle or energy level, then connect it to the result you saw. A strong explanation names both the cause and the evidence.
Check
Before you leave
What happened to the particles or energy?
What observation supports your explanation?
If you can answer all three using evidence from the model, you understand the main idea. If not, return to Explore and change one setting at a time.