Both vessels start with the same number of blue progress markers. A marker turns gold when it represents converted material. Compare how much turns gold by the same moment. In this model a warmer condition or a catalyst can speed conversion. Faster does not mean that extra starting material appeared. The catalyst is not used up overall.
Matter and chemistry · Discover & try
What can change how quickly a reaction proceeds?
Reading level 1 of 5 · EarlyChange
Word help
catalyst
A substance that changes a reaction pathway and is regenerated.
rate
How quickly a change occurs.
Watch · Try · Explain
See how it works
The interactive activity is loading.
Synthetic conceptual progress, not measured data, a universal rate law or hands-on chemical instructions.
What to look for
- Rate differs from final amount
- A catalyst is regenerated
- One-variable comparisons are easier to interpret
Explain what you noticed
A student changes both temperature and reactant amount. The reaction appears faster. What can that comparison establish?
Keep this idea: Test one condition at a time, and separate rate from final amount.
Follow the sources
- American Chemical Society — Temperature and Reaction Rate
- American Chemical Society — A Catalyst and Reaction Rate
Source material checked 2026-10-29. Explanations and activities by Nepedia. Source links do not imply endorsement.
Keep following the idea
Next discovery →