Here's a breakdown:
* Hydrogen peroxide (H₂O₂) is unstable. It naturally breaks down into water (H₂O) and oxygen gas (O₂).
* This process can be sped up by a catalyst. A catalyst is a substance that speeds up a chemical reaction without being consumed in the process.
* A common catalyst for this decomposition is catalase, an enzyme found in many living organisms.
* You can also use manganese dioxide (MnO₂) or potassium iodide (KI) as catalysts.
The chemical equation for the decomposition of hydrogen peroxide is:
2 H₂O₂ → 2 H₂O + O₂
This reaction is often demonstrated by:
* Adding a small amount of manganese dioxide to a solution of hydrogen peroxide. You'll observe bubbles of oxygen gas being released.
* Using a potato or liver. These contain catalase, which causes hydrogen peroxide to decompose rapidly, producing a visible foaming action.
