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Red Potato Osmosis Experiment

1860 Words8 Pages

Introduction Purpose The purpose of this lab is to study soil PH, soil salt concentration, osmosis and light. To identity potato weight change in sodium chloride. To determine the growth of plants scientist, farmer and business owners often work to determine the optimal conditions for their plants, which involves a variety of test and a large amount of trial and error over many years. I made a predication that the growing condition for red potato in this case is hypotonic. When the potato was placed in the 0.0m NaCl solution water diffused into the potato making it swell. The optimal NaCl condition …show more content…

These factors include, temperature and pH. Lower temperature like freezing lower enzyme activity. That is why food is preserved in a fridge for a longer period. Cold temperature does not denature enzymes, cold temperatures do not provide the activation energy needed for reaction to occur, even when an enzyme is present. Higher temperature makes enzymes to denature and so changes its shape and makes it perform a different function. Extremely high temperature like boiling (100 degrees Celsius) decrease enzyme activity. Most enzymes work best at body temperature of 37 (degrees Celsius). PH is another factor that affect the rate of enzymes activity. Enzymes function slowly in lower pH like in the pH of 1 or 2. Potato are high catalase when is being placed in a pH of 2 solution and hydrogen peroxide is added to it there will be some fizzing but not a good one. If the potato is placed in a pH of 13 and hydrogen peroxide is added there wouldn?t be any fizzing or little fizzing meaning that high pH either denature the catalase or substrate can not bind to the active site of an enzymes because its changes its shape. A potato piece in pH7 will work very well in hydrogen …show more content…

I measured and marked 3cm from the bottom of a small test tube. I filled the tube to 3cm marked with our assigned pigment solution. I then turn on our spectrophotometer and I loaded it with a test tube filled with distilled water into the slot in the machine and closed the lid. I then pushed the test button I pushed again the stored tests option and I pushed load test (chlorophyll). I pushed run test and then I pushed tabular. I pushed collect baseline. Took blank out and set in rack. I loaded my pigment solution tube and closed the lid. I pushed measured sample. Then the machine run for some period and gave me a list of

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