Hydrogen peroxide decomposition by potato catalase
Fair Testing
This is a summary of the steps that I will take to reduce the amounts of errors affecting the results.
- Keep the level of water in the ice cream tub the same and the retort stand with all the clamps and the funnel on it to make sure that the oxygen has the same distance to travel underwater each time.
- Use a burette (reasons already explained in plan).
- Use a compromise between factors (e.g. large volumes/longer times) to reduce percentage inaccuracies where possible.
- Record the temperature of the hydrogen peroxide, so that I can use the Q10 formula to temperature balance the results.
- Repeat each experiment 3 times to get an average.
- Keep the time that I collect for (five minutes) and amount which I collect (20 ml) there same so that the reactions are at the same stage in their natural exponential decay curve when the measurements are taken.
- Use potatoes from the same batch for all of the reactions.
