Learn With Aura on Instagram: "A catalyst is a substance that plays a crucial role in chemical reactions by making them happen faster. It achieves this by providing an alternative pathway for the reaction to occur, which requires less energy to get started. This initial energy barrier is known as the activation energy. A key feature of a catalyst is that it is not used up or consumed during the chemical reaction itself. This means that a catalyst can be recovered unchanged after the reaction is

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What is a Catalyst? - Answered - Twinkl Teaching Wiki