Testing techniques pH and their attractiveness in chemical education

Abstract

Currently, in everyday life, the term pH appears frequently in advertisements or on the packages for various products. The definition of pH has changed since the beginning of the 17th century. Currently, the Sørensen definition for pH from the beginning of the 20th century is most often used. However, many students and teachers find the mathematical notation very difficult to understand. Therefore, in education, teachers use various activities to introduce the concept of pH without having to introduce logaritmus and additionally to keep the classes interesting for students. Studies on the attractiveness of pH measurement laboratory classes were carried out. Five different activities of pH testing were investigated among pupils (8-10 years), university students and teachers.