Why do some chemical reactions happen quickly while others take much
longer? Change the temperature, concentration, and particle size to
investigate how these factors can affect the speed of a reaction.
Experiment controls
Adjust one factor at a time to see how the model's reaction rate changes.
Particle model · illustrative
25 °C
10 °C · Cooler80 °C · Hotter
Higher temperature generally makes particles move faster, increasing
the chance of successful collisions.
50%
10% · Dilute100% · Concentrated
A higher concentration means more reactant particles in the same
volume, usually leading to more collisions.
50%
10% · Larger pieces100% · Fine particles
Breaking a solid into smaller pieces exposes more surface for
collisions with the other reactant.
Record your observations
Write down your settings, compare the rates, and explain what you think caused the change.
Scientific note: This is a conceptual simulation. The relative
rate is calculated using a simplified illustrative formula; it is not a
universal law or a prediction for a specific chemical reaction. In real
experiments, the effect of temperature depends on the reaction and its
activation energy. Never mix unknown chemicals or heat chemicals without
appropriate supervision and safety equipment.