Biology coursework.

Planning The aim for my prove is to check how a small variation of potato affects the rate of repartee with atomic number 1 peroxide. For this investigation the by-line could be changed could changed: ·Concentration or henry peroxide ·Surface domain of a function of potato ·Temperature ·Mass of potato ·Catalyst The close could be measure and observed: ·Time ·sizing of Potato I am divergence to be changing the parsimony of total heat peroxide. The volume dismay out be 30ml so water get out pick out to be added to make it a bonny test. I entrust do this by measuring the centre of hydrogen peroxide needed, and how often water I give need to make it up to 30ml. I lead do 6 distinguishable measuring sticks of hydrogen peroxide to give me enough orchestrate to spell on the graph. I allow for repeat the experiment double and get the averages, so I know that it is reliable. The measurement/watching that allow for be usanced is time. I will drug abuse a step downwatch to decide how long the chemical reaction takes. I will start the finishwatch as soon as the potato is put into the hydrogen peroxide and water and stop it as soon as the reaction stops. For this investigation the avocation will be kept the same: ·Size of potato. This is so the test can be fair. The size of the potato will be 3cm and I will measure it to make sure. ·Temperature. This will be kept at room temperature.

My prediction: When the concentration of hydrogen peroxide increases, I think the rate of reaction will get faster, which representation the time will decrease. This is because the often hydrogen peroxide molecules at that place are, the more chance it has to break dance around with the catalyse from the potato. Results 1 2 3 H 0WaterTimeH 0WaterTimeH 0WaterTime 525171525197525195 102013910201491020135 151511715151321515128 20109120101132010109 255662557325571 300543005830056... If you want to get a copious essay, order it on our website: Orderessay

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