patterns in nature

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Year 11 BIOLOGY
assessment task

PATTERNRS IN NATURE

Aim: To evidence that iodine/potassium iodide solution incense through the dialysis bag.

Equipment:
Beaker
Iodine/potassium iodine separation
Dialysis bag
Funnel
Starch solution

Results: The event to this experiment is that the ~ation showed evidence that the molecules moved through the bag, went from being not beyond the mixture and transferred into the wallet and stayed there.

Discussion Questions:
1. Evidence of the molecules affecting through the dialysis bag is that the iodine dis~ went from being in the salmagundi and transfers into the bag which doesn’t allow the starch to pass out because it becomes to portly to pass through little holes in the limits of the bag so it causes the wallet to change colour from clear to a ~ened blue/ back colour and make the external mixture a clear liquid.

2. The conception why some molecules didn’t offer for consideration through the dialysis bag is inasmuch as the starch reacts with the iodine explication which makes the molecules expand in sizing.

3. No there is no make manifest because the water was clear steady the outer layers of the wallet and the iodine solution left the get ~ and went into the bag.

4. Osmosis is a form of diffusion that occurs in benefice cells specifically, it is the spread of water across a semi-permeable membrane. Water moves across cell membranes from a higher collection upon a single point. If the solute concentration inside the cell is higher than outside the cell, water will move into the confined apartment by osmosis.

5. The cell membrane was represented in the copy.

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