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What happens to the mass of a raisin when you put it onto different sugar solutions

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Introduction

Osmosis Aim What happens to the mass of a raisin when you put it onto different sugar solutions? A sugar solution is made from glucose and water. A raisin is a dried grape. A sugar solution is inside a grape. Prediction In a weaker sugar solution the water goes in, so the mass increases. In a stronger sugar solution the water goes out, so the mass decreases. In a weaker sugar solution the raisin's mass increase caused by osmosis, the particles are absorbed by the raisin. In a stronger sugar solution the raisin's mass decreases, also caused by osmosis, as the solution already inside the raisin comes out. This raisin has gained water by osmosis. This raisin has lost water by osmosis. ...read more.

Middle

Mass of raisin after 10 mins (g) Concentration of sugar solution (%) Sugar (g) 0.40 0.40 0 0 0.45 0.49 5 5 0.48 0.48 10 10 0.40 0.39 15 15 0.50 0.50 20 20 0.48 0.44 25 25 0.49 0.47 30 30 Second set of results Mass of raisin before (g) Mass of raisin after 10 mins (g) Concentration of sugar solution (%) Sugar (g) 0.23 0.25 0 0 0.32 0.31 5 5 0.48 0.47 10 10 0.47 0.46 15 15 0.61 0.59 20 20 0.40 0.58 25 25 0.58 0.56 30 30 Third set of results Mass of raisin before (g) Mass of raisin after 10 mins (g) Concentration of sugar solution (%) Sugar (g) 0.60 0.62 0 0 0.48 0.48 5 5 0.34 0.34 10 10 0.58 0.57 15 15 0.40 0.39 20 20 0.40 0.37 25 25 0.48 ...read more.

Conclusion

My results and prediction were similar because as I predicted. The raisin gained more mass in a weaker solution and lost mass in a stronger solution. Evaluation The method I planned wasn't good but it wasn't bad because I had to change it from every 5 minutes for 30 minutes, to after 10 minutes I weighed the raisin and went straight onto the next one. Everything else was accurate but I forgot to mention weighing the sugar. My results were accurate, because the experiment was a fair test and all the measurements were correct. There were no anomalies. I could have made this experiment better because I could have timed the experiment better to fit with the time I gave in my method. The results are reliable enough to get this pattern every time, because I repeated the tests three times and it came out with the same pattern. By Emma Howell ...read more.

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