Method:
We cut up some potato with a cork borer and put 5 bits in salt solutions and 1 in a beaker of water. We took the weight before it went in the solution and left it with Clingfilm over the top of the beaker for a day. We took the weight again to see how much it had changed.
Prediction:
I think that the potatoes in the high concentration will weigh more after osmosis because it would have absorbed more of the solution.
To make it a fair test we made sure we used the same amount of water in each beaker and put the potatoes in at the same time. All the bits from the same potato we put cling film over the top so the water would not evaporate, making the test unfair.
Results: Experiment 1
Analysis:
In the first experiment, as the concentration got higher, generally the mass of the potatoes got lower. In the second e
In the 1st experiment, as the concentration got higher, generally, the mass of the potatoes got lower, but the graph did not end up as a sigmoid curve which it is supposed to look like. In the 2nd experiment, as the concentration go higher, the mass of the potatoes got lower. The graph looks more like a graph with a sigmoid curve in but still, it is not exactly right, even though I did everything to make it a fair test and get the most accurate results.
My prediction is half correct. In some cases it is correct because the concentration is higher and the mass of the potato is lower, but in other cases the mass of the potato gets higher, which I did not predict. For example, on the 1st experiment at 2 and 4 concentrations the mass of the potato goes up and the same happens on the 2nd experiment at the 6% concentration.