The squeaky pop!10 Mar 2023
Form 7 were both scientists and tour guides this week.
In science, Form 7 were reacting magnesium with hydrochloric acid. They noted that the solution became more alkali (pH 1 to pH 4) after the reaction. They collected the gas during the reaction by keeping their thumbs over the test tube, then they inserted a lit splint into the test tube. On contact with the hydrogen gas, it made a mini explosion, which we heard as a squeaky pop. Mrs Carn also reacted sodium, and then potassium with water in the trough. The children observed the characteristic lilac flame of potassium.