Osmosis in Different Concentrations

2449 WordsDec 14, 201210 Pages
I am going to investigate osmosis when potato is placed in different concentrations of sucrose. I am aiming to witness osmosis in 5 different concentrations of sucrose. I will use 5 varying concentrations so that I have a wider spread to compare the results, and check that I don’t have any anomalies Prediction Osmosis is the process of diffusion of water molecules from a weaker solution into a stronger solution, through a semi permeable membrane. The tiny pores in the membrane of the potatoes will allow the water molecules to go in and out of the potato cell, depending on the concentration gradient between the potato and the sucrose solution. If the water concentration is lower in the potato than in the sucrose…show more content…
*Temperature of solution- because I was not able to obtain a thermometer and I was not in the laboratory for 24 hours so it could change. * Weighing scales – because these are digital and therefore, it produces results by itself. I will be able to control: * Concentrations of sucrose – they are already measured * Time – I will do the experiment, and come back the next day at the same time, and promptly record the results *weight of the potato- I weighed the potato slices before the experiment. For safety in the laboratory, I will be very careful using the sharp knife which I will be using to cut the potatoes with. I will make sure that I have an overall so that my clothes don’t get dirty if the solutions spills. I will remember not to put potatoes or sucrose in my mouth as they might have been infected by chemicals in the lab, which are poisonous. I will measure the weight of the potato in grams, and the concentration of sucrose in percentage. I am expecting everything to work out well as I have a perfectly good method but if I feel that the results may be wrong, I will repeat my experiment. Preliminary results These are my results: This experiment supports my plan and prediction. The carrot gains weight in normal water, and decreases weight in concentrated sugar solutions. By doing this experiment, I believe that my method is good, and it will work. I think I should
Open Document