Ap Bio Diffusion Osmosis Essay

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The tubes were dried off and measured on the triple beam scale.

The mass was taken and recorded for all three tubes.

Whereas Osmosis is the process in which water crosses membranes from regions of high water concentration to areas with low water concentration.

While molecules in diffusion move down a concentration gradient, molecules during osmosis both move down a concentration gradient as well as across it.

Both diffusion, and osmosis are types of passive transport, which do not require help.

When the concentration of the environment outside of the cell is lower than the inside Results The potato cores started to decrease in weight as the molarity went up.The magnitude of the concentration gradient will play the biggest role in this experiment.A permeable membrane is a type of membrane that only allows certain molecules to pass through it.I then placed the tubes back into their respective solutions.The process was repeated four times for each tube in 5 minute increments, and then the materials were disposed of.Biology formal lab report on osmosis and diffusion 1.Osmosis 1 OSMOSIS By: Shelby Lazorka Lab Partners: Laurel Miner and Kristi Raible Biology 120-949 Professor Aguayo October 31, 2012 2.The initial mass (in grams) of the tubes was taken using a triple beam scale.I then filled three 500 m L beakers with 400 m L of water each and dissolved different masses of solute (table sugar) in each beaker in order to make 5%, 10%, and 20% solutions.The beakers were labeled accordingly, and then 20 g, 40 g, and 80 g (respectively) of table sugar was weighed out using a digital scale and placed into the corresponding beakers.The sugar was stirred in using a stirring rod until all of the solute was completely dissolved. Osmosis was allowed to occur for 5 minutes and then all of the tubes were removed from the water.

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