Osmosis Investigation

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Osmosis Investigation

To se 6/03e how varying the concentration of

Sucrose solution affects the water

Gain or loses on a potato

Chip during osmosis.

Aim

To investigate if osmosis occurs in potatoes and whether varying the

concentration of sucrose solution affects the water/mass gain or loss

in the potato chips when kept in a constant environment.

Equipment

* 5 same volume test tubes: to hold sucrose solution and potato

chips.

* 2M, 1M and 0.5 M sucrose solution (15ml)

* Distilled water: as a control to all the other experiments ( to

compare the pure water to the sucrose solutions)

* Test tube rack: to hold test tubes.

* Measuring cylinder (15ml): to measure sucrose solution)

* 5 small pieces of potato (0.7*0.7*3.1 cm)

* Knife: to cut potato into size.

* Pipette: to transfer sucrose solution from container to test tube.

* Mass balance: to measure mass of potato chips at beginning and end

of experiment.

* Timer: to time the experiment making sure each potato chip

receives the same amount of time in the test tube.

* Tissue paper: to dry the potato after osmosis has taken place- so

it is a fair test.

* Cutting tile: to cut the potato safely not damaging the lab

tables.

* Thermometer: to measure room temperature.

Diagram Test tubes

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[IMAGE] Sucrose solution

Test tube rack

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Potato

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2M 1.5M 1M 0.5M Distilled water

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