Simulate the catalytic decomposition of hydrogen peroxide using manganese dioxide.
Observe the rapid production of oxygen gas when the catalyst is added.
Catalytic Decomposition Setup
Hydrogen Peroxide (H₂O₂) Solution
Oxygen Gas
Observation:
Click "Add MnO₂ Catalyst" to observe the decomposition of hydrogen peroxide.
The Science Behind Catalytic Decomposition
Chemical Reaction:
2H₂O₂(aq) → 2H₂O(l) + O₂(g) (with MnO₂ as catalyst)
Catalysis Mechanism:
Step 1: MnO₂ provides an alternative reaction pathway with lower activation energy
Step 2: H₂O₂ molecules adsorb onto the MnO₂ surface
Step 3: O-O bond in H₂O₂ breaks more easily on the catalyst surface
Step 4: Oxygen gas is released while MnO₂ remains unchanged
Key Components:
Component
Role
Details
Hydrogen Peroxide
Reactant
Unstable compound that decomposes to water and oxygen
Manganese Dioxide
Catalyst
Speeds up reaction without being consumed (heterogeneous catalyst)
Oxygen Gas
Product
Collected in the gas syringe
Catalyst Characteristics:
Type: Heterogeneous catalyst (different phase from reactants)
Surface Area: Powder form increases effectiveness
Reusability: Can be filtered and reused
Specificity: Works particularly well for peroxide decomposition
