Reaction with metals

1 mark · Easy

State the products formed when dilute butanoic acid reacts with magnesium metal.

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Magnesium butanoate and hydrogen gas

Also accept: Hydrogen and magnesium butanoate; Magnesium butanoate and H2; H2 and magnesium butanoate

Common mistakes: Stating only hydrogen, missing salt name or formula

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Marking points

B1 · 1 mark · Both products correctly named: magnesium butanoate and hydrogen gas; accept 'hydrogen' and correct salt name.

Worked solution

When magnesium reacts with butanoic acid, the products are magnesium butanoate and hydrogen gas.