osmosis on potato
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... solutions of sucrose, and distilled water. I will weigh each set and have them ready for us to put into the petri dish. We will then get 25cm of the solutions and the water with help of the measuring cylinder, and pour them into the petri dish, naming them to make sure that they donĘt get mixed up. Then we will put the 6 sets of 3 potatoes in the 6 petri dishes at the same time and start the clock running for 20 minutes. After 20 minutes, we will take all of the potatoes out of the petri dish, so that the actual osmosis action stops, and we will put the potatoes onto one piece of dry towel, in their own groups. We will dry them with the tissue paper, in sets of 3, and weigh and measure the potatoes taking in the average reading of the 3 pieces. We will repeat the experiment three times so that we can make sure that all our results are similar, and so that we will be able to take the average of the 3 experiments. This makes sure that we get accurate results. Repeating the experiments are important, because we will be able to receive valid results, and look for any anomalous results. Not to mention that we will take the fair testing into account. Method In the actual experiment, instead of using a cork bearer of 10mm diameter, we had to use a cork bearer of 8mm diameter. Although there was a change in plans, I donĘt think this change would affect neither my hypothesis, nor my results that we got. As for the experiment that we carried out, no changes were made in the experiment. Obtaining evidence After the experiment, I had to dry the potatoes first, so that the water outside the tissue of the potatoes wonĘt alter the weight of what it is supposed to be. I quickly took all of them out, and put them onto a piece of tissue paper, into their own groups. When obtaining my results, I reset the balance, so that it would read zero with the small foam bowl on top of it. This was because, if I had weighed the potatoes with the bowl, then I would have to take the weight of the bowl away from that result. Table of results In the table below, it shows the ęsolutionĘ column, which are th ...
