A scientist measures the rate of a reaction between two liquids. Then he performs the reaction again, adding solid manganese. The reaction takes place more quickly the second time. The mass of the manganese decreased by 0.45 grams during the reaction. He claims that the manganese acted as a catalyst because it sped up the reaction. Explain what is wrong with the scientists' reasoning.

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21 May, 23:56

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Aries · Answer 1

A catalyst speeds up the reaction, but it is never consumed during the reaction (shown in this case by the decrease of Mn mass).