Year 8 Science – Squeaky Pop Test


Our Year 8 Science students became chemists and investigated what happens when metal reacts with acid, by conducting the classic Hydrogen “Squeaky Pop” Test.

After pouring 10mls of diluted hydrochloric acid into a test tube, students added a small piece of magnesium metal to the acid, and as the chemical reaction began to occur, they placed an empty test tube over the top to trap the forming hydrogen gas.

After waiting for the reaction to build up, students uncovered the test tube, lighting a match at the top and hearing the characteristic “POP!” as the hydrogen ignited.

The experiment is used to identify the presence of hydrogen gas, and also helps students understand chemical reactions, as the reaction between the magnesium metal and hydrochloric acid produced hydrogen gas and magnesium chloride.

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