Osmosis Coursework
- Date: March 18, 2006
- Level: High School, 11th grade
- Grade: A
- Length: 12 pages (3024 words)
- Essay rating:
- Keywords:
potato chips, sucrose solution, preliminary investigation, water potential, line of best fit, concentrations, ...aim, percentage change, solute, intercept, equilibrium, hypothesis, crosses, axis, graph, accomplish, concentration
Hide extra keywords
Subject > Science Essays > Biology
Investigating the water potential of Potato tissue.
Introduction:
In this investigation I aim to discover the water potential and solute potential of potato tissue. I will accomplish this by placing potato pieces of equal size into varying concentrations of sucrose solution and examining the percentage change in mass. Then I will plot my results onto a graph and work out the intercept at which the line of best fit crosses the x-axis (concentration of sucrose solution). This will give me the water potential of the potato tissue, i.e., the point at which there is no increase or decrease in mass and the cell is in equilibrium.
Preliminary Investigation:
Introduction:
I have conducted a preliminary investigation to examine the mass change of potato 'chips' in 5 ...
... different effects on the size/mass of the potato strips.
Controlled variables: These are the variables which I am intentionally keeping the same in each potato strip. I am testing the effect that varying sucrose solutions have on potato strips of a certain length (2.5cm), so the length must be kept consistent. I will keep the length of each potato strip as standard by using a cork borer which insures they all have the same diameter, and measuring them precisely with a ruler before cutting them to a length of 2.5cm with a sharp knife for precision.
Temperature is another factor which should be kept as consistent as possible because temperature directly affects
essay continues for another 100 words
