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(c) A student is given three metals, X, Y and Z to identify. The metals are magnesium, iron and copper. Plan an investigation to identify the three metals by comparing their reactions with dilute hydrochloric acid. Your plan should give valid results.

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Magnesium reacts quickly with HCl while iron reacts more slowly with HCl. Copper does not react at all with HCl.

Rates of reactivity of metals?

We have to  recall that the reactivity of metals is determined by the position of the metal in the electrochemical series. This is an  arrangement of metals from more reactive to least reactive.

Magnesium and iron  reactwith dilute HCl to give hydrogen gas but the rates of reaction differ. Magnesium reacts fastest with HCl followed by iron but copper does not react with HCl at all.

Learn more about reactivity of metals: https://brainly.com/question/22929949

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