OSMOSIS
The outcome in the increase of sucrose absorption in the mass of Chips
November 27, 2017
Candidate number: ftp678
BIOLOGY IA SL
Research Question:
If the chips are put under water in a sucrose solution., will their mass decrease in a certain concentration of sucrose solution?
Hypothesis:
The increase of volume of sucrose solution will affect the mass of the chips to decrease since the water will possibly transport itself out of the cells. The larger the absorption of sucrose solution, the lower the mass of the chips will become. On the other hand, if it is in infused water or has very low concentrations of sucrose, the mass of the chips will escalate. This is because the water will enter inside the cells.
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Controlled Variables
For what reason was it controlled? The method is used to control it?
1. The 200 cm3 volume of the solution inside the beaker To insure that the concentration in the experiment is the only variable that changes, the volume needs be controlled A 100 cm3 measuring cylinder is used to measure the volume.
2. The diameter of the chips used The surface area converted to volume ratio will affect the rate of osmosis We used a small Swiss army knife and carefully cut the chips.
3. The length of the chips used The surface area converted to volume ratio will affect the rate of osmosis Used a ruler to measure 3 cm, then we used a scalpel to cut the chips. If the length wasn’t right, we had plenty of chips to use.
4. The original mass of the chip The last final results of the mass inside the beaker taken after the experiment Used a balance to check the mass.
5. The temperature The rate of diffusion is affected by the temperature The temperature was controlled through the air conditioning, and made it
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Make space for the large green tile.
2. Take 10 potatoes, which should look similar to one another, in the size and shape.
3. Take a small Swiss army knife and carefully cut the potatoes and try to end up with 30 potato chips.
4. Place the potato chips carefully on the green tile, a bit separated between each other.
5. Take a scalpel and peel off the remaining skin. Makes sure they are all clean.
6. Keep all of the potato chips no longer than 6 cm. Use the 15 cm long ruler to help you if you are trouble.
7. Now cut the 6 cm long potato chips in half, use the 15 cm ruler to help you to make the potato chips 3 cm long. (Exactly half)
8. The next step is to take the potato chips and weight the mass of the potato chips, use a balance for this.
9. Remember that all of the potato chips need to have a 0.1g difference.
10. Remember to also record this. So you know with what the initial mass was.
11. The next step take out the beakers with the sucrose solutions. Remember that the 0.0 beakers will have distilled water. The rest of the beakers will have concentrations of 0.20 mol dm3, 0.40 mol dm3, 0.60 mol dm3, 0.80 mol dm3, 1.00 mol dm3 of sucrose.
12. Remember that the solutions need to have a volume of 200 cm3, if you are struggling, use a measuring