Coursework - Osmosis

Coursework - Osmosis Planning Aim: To investigate what concentration of saccharose final result is isotonic to murphy cellphone sucker. Apparatus:0M sucrose (aq) (distilled water) 2M sucrose (aq) Potato Chip lop offter Knife Boiling tubes amount cylinder (25cm3) vernier scale callipers (to nighest 0.1mm) Balance (to nearest 0.01gram) guard duty: I exit ensure safety around the testing ground by: wearing safety goggles, laying penning towels, removing baggage from whirling space, push stools under the bench, stand up, walk guardedly and slowly - dont rush and handle equipment and apparatus carefully. explorative Experiment: I did a small experiment to begin with doing the real whizz so I could find a suitable roam to base my investigation round. I clean-living plagued 3 chips in 3 change state tubes, individually containing 20cm3 of: 0M sucrose, 0.5M sucrose and 1M sucrose. Moles of Sucrose /M         Original Mass /g         Mass aft er 3 hours /g         Up/ cut in push-down stack 0M         8.02         9.94         Up 0.5M         8.18         7.83         Down 1M         8.83         7.20         Down As you can gossip from my preliminary results, I should investigate among 0M sucrose and 0.5M sucrose as a suitable range. I predicted that the isotonic concentration lies between 0.35M and 0.4M.

Method:I will cut 5 chips with no throw together on them and have them approximately the same length, width, breadth an d mass (using the balance and Vernier callip! ers for extra accuracy), because I will dry off the sap completely. I will use the measuring cylinder to accurately make: 20cm3 0.1M sucrose, 20cm3 0.2M sucrose, 20cm3 0.3M sucrose, 20cm3 0.4M sucrose and 20cm3 0.5M sucrose, each putting it into a turn tube. I will then place the 5 homogeneous chips in each boiling tube and leave for 3 hours so osmosis can befall fully. Scientific Knowledge: A potatos cell has a fully porous cell wall, just a selectively permeable cell membrane, which allows certain substances to... If you require to get a full essay, tack together it on our website: BestEssayCheap.com

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