Osmosis In A Potato :: Papers

Osmosis In A potato Intro ====== My biology coursework is based round the osmosis play that feigns place in potatoes. Osmosis is the intake of a salt solving through a selectively permeable membrane. The strength of a salt solution can have a dramatic difference on the arrive the potato can take in, and how it reacts. Here is an example of a selectively permeable membrane Salt Solution IMAGEIMAGE significant Weak IMAGE Strong Weak Salt Solution IMAGE Variables An fundamental necessity in my biology experiment is to decide which variable I am going to utilisation and modify. A variable is an aspect of the experiment which can be change in order to change the outcome of the entire osmosis experiment. Below be the variables I have available * Temperature * Solution Strength * Size Of Potato * Weight Of Potato After a lot of careful figuring I have decided to use the solution strength as my variable. I chose this because it enables me to witness the effect different strengths of solution have on osmosis. Method To carry out my experiment successfully I volition need to stick to the diagram below. IMAGE Firstly, I will take 6 test subway systems with different strength salt solutions and add them to a test tube rack. I will consequently cut up a potato and measure them to make sure they are the necessitate size, for this experiment I have chosen 1.0cm. I will then add two measurements of potato into distributively test tube. The test tube will then be left over night in a fuming cupboard, and results will be taken the next morning. Fair interrogation To make sure my experiment is fair I will hold water by the following guidelines * Use the same sized test tube. * dissemble sure each strength is measured exactly. * Make sure each piece of potato is exactly the same size as the next.