Hydrogen Peroxide + Bleach Explanation

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The reaction between bleach and hydrogen peroxide is a decomposition reaction. Hydrogen peroxide is what is known as an unstable substance, meaning that it breaks up by itself. The bleach is called a catalyst.

So, as you can see in the reaction when the bleach is poured in, the hydrogen peroxide decomposes into its base elements, but not completely. What you have left is water and oxygen, because hydrogen peroxide is in general terms a water molecule with and extra oxygen, and so, when it breaks up, it loses that extra oxygen.

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