Science Week: Chemical Reactions with Mrs Hosie

Mrs Hosie returned on Monday this week to deliver lessons on chemical reactions to each class. During these lessons Mrs Hosie involved the pupils in the coke and Mentos experiment. The pupils were encouraged to think of a hypothesis, before the experiment then consider the reasons for the chemical reaction that took place. They learned that when the Mentos sink to the bottom of the cola bottle, carbon dioxide bubbles are created. As the bubbles risethey react with more carbon dioxide which is still in the cola building up lots of pressure which creates an eruption of the liquid.