Investigate what concentration of sucrose solution is isotonic to potato cell sap.

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Biology Coursework - Osmosis - To Investigate concentration of sucrose solution is isotonic to potato cell sap.

Biology Coursework - Osmosis

Planning

Aim: To investigate what concentration of sucrose solution is isotonic to potato cell sap.

Apparatus:0M sucrose (aq) (distilled water)

2M sucrose (aq)

Potato

Chip cutter

Knife

Boiling tubes

Measuring cylinder (25cm3)

Vernier callipers (to nearest 0.1mm)

Balance (to nearest 0.01gram)

Safety: I will ensure safety around the lab by: wearing safety goggles, laying paper towels, removing baggage from walking space, push stools under the bench, stand up, walk carefully and slowly - don't rush and handle equipment and apparatus carefully.

Preliminary Experiment: I did a small experiment before doing the real one so I could find a suitable range to base my investigation round. I used 3 chips in 3 boiling tubes, each containing 20cm3 of: 0M sucrose, 0.5M sucrose and 1M sucrose. studentcentral.co.uk

Moles of Sucrose /M

Original Mass /g

Mass after 3 hours /g

Up/Down in mass wwfb fbw stfbfbud efb fbnt cfb enfbtral fbcofb uk.

0M

8.02 wwcb cbw stcbcbud ecb cbnt ccb encbtral cbcocb