The enzyme catalase catalyses the decomposition of hydrogen peroxide into water and oxygen. In an investigation of how pH affects the reaction rate of catalase, potato cubes were placed in hydrogen peroxide. Which dependent variable should be measured?
- Athe change in mass of the potato after a given time
- Bthe pH of the solution at regular time intervals
- Cthe number of potato cubes added at the start
- Dthe volume of oxygen given off at regular time intervals