The aim of this experiment is to see the effects on potato chips after placing them in different concentrations of sugar solutions.

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Effect Of The Concentration Of A Sugar Solution

 On A Potato

Aim

        The aim of this experiment is to see the effects on potato chips after placing them in different concentrations of sugar solutions.

Prediction

        The potato chip will decrease in length and weight of concentrations 80% and 60%. At 40% the potato will stay the same. At concentrations 20% and 0% the potato will increase in length and weight.

Scientific Knowledge

           This occurs due to Osmosis. Osmosis is the net flow of water through a selectively permeable membrane. It’s really a special case of diffusion, in which only the water molecules move from one region to another. Water molecules move from a high concentration to a region of low concentration.

Apparatus

  1. 5 specimen bottles with caps on them labelled A, B, C, D and E.
  2. 1 potato
  3. 1 knife
  4. 1 Weighing machine
  5. Distilled water
  6. Sugar solution
  7. Ruler

Method

  1. First cut and peel 5 potato chips.

  1. Cut them so that their weight and height are the same, by using a weighing machine and a ruler. Record all your results in a table.

  1. Then label the potato chips A, B, C, D and E.

  1. Place chip “A” into the first specimen bottle and pour 8ml of sugar solution in to the bottle. This is equivalent to 80%-sugar solution. Now add 2ml of distilled water. This is equivalent to 20%-distilled water. The use of distilled water is important, as this contains no impurities, which may affect the experiment.
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  1. Then place chip “B” into the second specimen bottle and pour in 60% (6ml) of sugar solution and 40% (4ml) of distilled water.

  1. In the third specimen bottle, place chip “C” in and add 40% of sugar solution and 60% of distilled water.

  1. Place chip “D” in the fourth specimen bottle and add 20% of sugar solution and 80% of distilled water.

  1. In the last specimen bottle place chip “E” in and just add 100% of distilled water. (Step 4,5,6,7 and 8 are all shown in the diagram below)

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