🔥 Preparing oxygen: virtual chemistry experiment
Heat potassium permanganate, pipe the gas into a gas jar and confirm with a glowing splint.
▶ Launch this experiment freeRuns in your browser on any phone, tablet or laptop. No sign-up, no install, no chemicals needed.
What you'll do
- Select the Bunsen burner and light it
- Heat until the crystals decompose
- Select the gas jar and test it with a glowing splint
The chemistry behind it
2KMnO₄ → K₂MnO₄ + MnO₂ + O₂↑. Oxygen supports combustion, so a glowing splint bursts back into flame.
Why do this experiment virtually?
Many school labs can't run this experiment safely or don't have the chemicals. In Faradium you set it up in seconds, repeat it as often as you like, change the amounts and see the real result: colours, gases, precipitates and temperature changes. The lab notebook records every observation with the balanced equation for your write-up.
Frequently asked questions
How do you do the preparing oxygen experiment?
1. Select the Bunsen burner and light it 2. Heat until the crystals decompose 3. Select the gas jar and test it with a glowing splint You can run every step free in the Faradium virtual chemistry lab.
What is the chemistry behind preparing oxygen?
2KMnO₄ → K₂MnO₄ + MnO₂ + O₂↑. Oxygen supports combustion, so a glowing splint bursts back into flame.
Can I do the preparing oxygen experiment online for free?
Yes. Faradium sets up the bench for you and ticks off each step as you complete it. It runs in any browser on a phone, tablet or laptop with no sign-up and no chemicals.
Chemistry in this experiment
Elements involved: Oxygen (O), Potassium (K), Manganese (Mn).
More experiments to try
🧪 Acid–base titration
Find the end-point of HCl vs NaOH with phenolphthalein and plot the titration curve.
✨ Golden rain
Make lead(II) iodide, dissolve it hot, then watch glittering golden crystals form on cooling.
🐘 Elephant's toothpaste
Iodide-catalysed decomposition of 30% hydrogen peroxide produces a towering, steaming foam.
🫧 CO₂ and limewater
Marble + acid makes CO₂. Bubble it through limewater: milky, then clear again in excess.