The reaction in Fig.1 takes place rapidly when manganese(IV) oxide is present in the mixture. However, the manganese(IV) oxide is unchanged when the reaction has finished: it acts as a catalyst. At the end of this reaction, when all the hydrogen peroxide has broken down, the catalyst remains chemically unchanged.
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Perfect (Ed Sheeran song) Perfect is a song by English singer-songwriter Ed Sheeran. It was included on his third studio album Ã· (2017). After the album's release it charted at number 4 on the UK Singles Chart, despite not being an official single at the time.