Catalysts
Same amount of oxygen, made much faster
No catalyst With catalyst
Time (s) No catalyst
cm³		 With catalyst
cm³
No catalyst With catalyst
2H₂O₂ MnO₂⟶ 2H₂O + O₂ Lower hill, same energy change. The catalyst is not used up.
Method
Time —
Oxygen made —
Rate now —
Catalyst mass —
Step 1 of 3 — pour in the hydrogen peroxide
Accessibility — Adapt
Theme
Dark navy theme
Colour overlay (Irlen)
Off
Display
Reading ruler
Wider spacing (dyslexia)
Text size
100%
High contrast
Classroom / projector mode
Method checklistLists the three steps along the bottom and ticks them off as you go.
Meter readingsShows time, oxygen, rate and catalyst mass as large numbers in the footer.
Outline the apparatusDraws a dark edge round the flask, the syringe and the balance so they stand out from the bench.
Label the syringePuts the oxygen collected so far on a card above the gas syringe, inside the scene.
Name the catalystPuts the name of the black powder on a card by the balance. The peroxide bottle is labelled already.
Show the bubblesShows oxygen bubbling out of the liquid while the reaction is going.
Procedure
Buttons onlyAdds a button for every action, so nothing has to be tapped in the 3D scene.
Extra slowStretches each run out to about half a minute, so there is longer to watch the numbers climb.
Motion & colour vision
Reduce motion
Slow animation
Auto-rotate camera
Protanopia
Deuteranopia