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Testing Osmosis From a Sugar Solution to a Potato.

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Testing Osmosis From a Sugar Solution to a Potato How Plants Get the Food They Need. The process of water and water soluble chemicals (nutrients) getting into a plant is called osmosis. It happens because many chemicals are more concentrated inside the plant than they are in the water that is in contact with the fine root hairs outside the plant. Water and water soluble nutrients permeate through the cell wall of the root in an attempt to equalize the concentration of these chemical solutions. This never happens because the plant is constantly using the water soluble nutrients, along with energy from sunlight (photosynthesis) to create new cells, so it grows. Introduction: Osmosis is the passage of water molecules from a weaker solution into a stronger solution through a partially permeable membrane. In this case, Osmosis applies to our practical because we are trying to see if a sugared solution has an effect on potatoes. ...read more.


Then I will measure out 20 ml of different sugar solutions and pour them into six different test tubes. The test tubes will be resting in a test tube rack. The range of sugar solutions starts at distilled water, 0.1 m, 0.2m, 0.3m 0.4m, and lastly 0.5m. The potato pieces will then be placed in the six test tubes and left for 24 hours. After 24 hours, the potato bits are weighed once more. The weight is measured to two decimal places as well and then recorded. This experiment will be repeated two times for each concentration of sugar solution. Variables: In this particular experiment, various variables could be changed. * Concentration of solution * Temperature of solution or Temperature of the room * Amount of solution Making my experiment fair: I will make sure that the potato chips are the same size and mass. ...read more.


Therefore producing an accurately detailed result table. Evaluation: Although all the results were obtained, this experiment could have been more precise. The scales that were used were sometimes dirty, which could have added more weight than necessary. A better scale could be in order if the practical was repeated. Also, a scale that went to two or three decimal places would of made this practical more accurate. Another thing that could make this experiment more accurate would be some kind of device to cut the potato bits into the same lengths as each other. However, I must vouch that I tried my best to cut the potato as precisely as possible. One more thing would be a timer. In order to achieve the best results, the timing must be correct. It was slightly impossible for me to take all six-potato bits out at exactly thirty minutes. Thus, it left some potato pieces in longer than other giving them maximum exposure to greater osmosis. All in all, it was an adequately accurate practical. Fortunately, there were no anomalous results in this assessment. ...read more.

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