|
|
This is only a preview of the paper
Click here to register and get the full text.
Existing members click here to login
|
|
|
Plan Equipment Test tubes 1 Potato Cork borer 1 Molar sugar solution Scalpel / Knife Ruler Weights Stop clock Distilled water Aim To find what concentration of one molar solution you need to obtain a solution at which the same amount of water goes in to the amount that goes out. What I will do From my preliminary experiment, I already know that using all ten millilitres of a one molar sugar solution will give a negative percentage change whereas all ten millilitres of water will give a positive percentage change. I also noted that there was a much higher negative percentage from using all ten millimetres of one molar solution Therefore I will start at nine millilitres of water to one millilitre of one molar sugar solution and go down in half millilitres of water until five millilitres. Firstly I am going to use the same cork borer to make sure the circumference is the same and then cut it into two centimetre cylinders. This should result in a very similar mass at the beginning, though there may be some odd ones due to there being more water in a certain section of the potato. I will then leave all of them for twenty-five minutes as this should allow enough time to enable osmosis to take effect fully. I will not heat or stir any of them, this is because one could have a better bunsen burner or I would have no way of telling how hard the stirring was on one compared to another, this would create unfairness among the results. I will also use the same bottle of water and same bottle of sugar solution, this is to prevent different strengths. I will also use a separate syringe for the molar solution and the water solution, this is to prevent contamination.
Approximate Word count = 1209
Approximate Pages = 4.8
(250 words per page double spaced)
|
|
|
|
|
|