On Thursday afternoon Owl Class undertook some investigations into a couple of chemical reactions. We looked the role of an indicator in determining whether a substance was an acid or an alkali and used it on vinegar and bicarbonate of soda. We discovered that vinegar was an acid and that bicarbonate of soda was an alkali and as such they produced a reaction to neutralise each other. We watched our balloons expand (or explode in a couple of cases!) with Carbon Dioxide, which was the gas given off by the chemical reaction. All in all a thoroughly interesting investigation - even writing it up was fun!