Reactions of acids

2 marks · Normal

Name the gas formed when a metal such as magnesium reacts with dilute hydrochloric acid. State the test for this gas.

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Also accept: Name: hydrogen; Test: produces a 'pop' with a lighted splint.

Common mistakes: Confusing with oxygen or carbon dioxide; wrong test.

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Marking points

B1 · 1 mark · Correctly names the gas as hydrogen.

B2 · 1 mark · States test for hydrogen: burns with a pop with a lighted splint.

Worked solution

Hydrogen is formed. It is tested for by putting a lighted splint near it; it burns with a 'pop' sound.