Which condition did you change?
Labs / Chemistry
Diffusion
A single drop of dye sits in the middle of a still solvent. Each particle takes tiny random steps — no one pushes them anywhere in particular — yet together they spread out to fill the whole container. Warm it up, add a second colour, and watch two clouds bleed into each other.
Diffusion
A single drop of dye sits in the middle of a still solvent. Each particle takes tiny random steps — no one pushes them anywhere in particular — yet together they spread out to fill the whole container. Warm it up, add a second colour, and watch two clouds bleed into each other.
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
σ 2.0%t 0.0 sN 520
Investigate
Questions to test
Predict first, try it in the model, then use what you observe to answer.
What to try
- Nobody aims the particles, so how does a sharp drop always end up as an even, uniform colour?
- Crank the temperature up and down. Does hotter solvent reach a smooth mix faster or slower — and why should heat change the spreading rate?
- Watch the σ readout climb. Early on it rises quickly, then levels off — what is happening at the walls when it stops growing?
- Add a drop of the second colour. Do the two dyes ever "un-mix" and separate again on their own?
- Turn on the concentration map. Where is the dye most crowded, and how does the gradient from dense to empty change as time passes?
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.