Question

Different metals react with hydrochloric acid at different rates as shown in the diagrams below. The
order from least to most reactive metal is
(1) zinc, magnesium copper
(2) copper, zinc, magnesium
(3) magnesium, zinc, copper
(4) copper, magnesium, zinc

Answer 1

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☸ Required Answer is ⬇ ⬇⬇ ⬇


⭐ 3). magnesium,zinc,copper


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Answer 2

Explanation:

Copper has a higher reduction potential than hydrogen and therefore it does not react with Hydrochloric acid.

As for Zinc and Magnesium they react with HCl but at different rates.

Again the number of bubbles within the given time depicts the rate of reaction.

More bubbles within a short period depicts that the metal is highly reactive.

With this information we can now answer the question.

The least reactive is Copper whereas the most reactive is Magnesium.

The order is as follows :

Copper, Zinc, Magnesium