P7.2 have been learning about pH and how it can be used to express  the acidity or alkalinity of a solution on a scale. The pH scale is numerical where 7 is neutral, lower values are more acid and higher values more alkaline. Using pH paper we tested the pH of a variety of substances and chemicals, recording and ordering them according to the scale. We took litmus paper home and tested more everyday items, sharing what we learned through our Google Classroom.