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Investigate the effect of potato on hydrogen peroxide

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Investigate the effect of potato on hydrogen peroxide Aim; is to investigate whether potato with increased surface area, can change the reaction time of hydrogen peroxide breaking down into H2O2. Prediction; I predict that by separating a potato into smaller pieces, it will provide an increased surface area for the catalyse in the potato to collide with the hydrogen peroxide which will therefore allow it to break up into hydrogen and oxygen much faster. Potatoes contains enzymes called catalyse. Enzymes speed up the reaction process and I can prove this by using a control in my experiment, as the air contains no catalyse, therefore there will be little or no froth in the hydrogen peroxide control. I know that increasing the surface area of the potato will speed up the reaction because in the emulsification of fat, bile is added into the small intestines to break up the fat pieces into fat droplets, which therefore speeds up the emulsification process because the enzyme lipase now has an increased surface area to digest than before the bile was added. ...read more.


To allow a fair, reliable and precise experiment, use the same mass of potato each time, using the same potato. The volume of hydrogen peroxide each time will be exactly the same. Also use the same equipment and complete the experiment as carefully as possible, to allow least error. It would be unfair not to follow these rules as the results will not correspond with each other or not show any obvious patterns. Therefore this experiment would be a void. Make sure that when you measure out the hydrogen peroxide, you don't leave it in the boiling tube too long otherwise the solution will become denatured and the reaction will not take place accurately. Also make sure that the solution is the same temperature and same pH value as this could also affect the results. I know this because in the digestion process, enzymes only work under the correct temperature and pH conditions. I will conduct a preliminary experiment to allow me to choose the correct volume of hydrogen peroxide and mass of potato to use. ...read more.


mins 12mm 14mm 15mm 17mm 18mm 4 min 13mm 15mm 16mm 18mm 19mm 4:30 mins 14mm 16mm 18mm 19mm 20mm 5 mins 15mm 17mm 19mm 20mm 21mm Repeat Experiment TIME 1 PIECE 2 PIECES 3 PIECES 4 PIECES 5 PIECES 30 secs 4mm 5mm 7mm 7mm 8mm 1 min 6mm 7mm 8mm 8mm 9mm 1:30 mins 8mm 9mm 10mm 10mm 11mm 2 mins 9mm 10mm 12mm 11mm 12mm 2:30 mins 11mm 11mm 13mm 12mm 14mm 3 mins 12mm 12mm 14mm 14mm 15mm 3:30 mins 13mm 13mm 15mm 17mm 16mm 4 min 14mm 15mm 16mm 18mm 18mm 4:30 mins 15mm 16mm 17mm 19mm 19mm 5 mins 16mm 17mm 18mm 20mm 20mm Average Results TIME 1 PIECE 2 PIECES 3 PIECES 4 PIECES 5 PIECES 30 secs 4.5mm 5mm 6.5mm 7mm 8mm 1 min 6mm 8mm 8mm 9mm 9.5mm 1:30 mins 8mm 9.5mm 10mm 10.5mm 11mm 2 mins 9mm 10.5mm 11.5mm 11.5mm 12.5mm 2:30 mins 10.5mm 11.5mm 13mm 13.5mm 14.5mm 3 mins 12mm 12.5mm 14mm 14.5mm 15.5mm 3:30 mins 12.5mm 13.5mm 15mm 17mm 17mm 4 min 13.5mm 15mm 16mm 18mm 18.5mm 4:30 mins 14.5mm 16mm 17.5mm 19mm 19.5mm 5 mins 15.5mm 17mm 18.5mm 20mm 20.5mm Artie Prajapati Biology ...read more.

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