lab

A detailed Summary of lab

If a laboratory assistant prepared solutions of 0.8M, 0.6M, 0.4M, and 0.2M

sucrose but forgot to label them there would be no need for him to panic. Knowing the

principles of water movement through the processes of osmosis and diffusion, one can

conduct a rather simple experiment to determine which flask contains which solution.

According to the principles of osmosis, water typically moves from solutions of low solute

concentration to areas of high solute concentration. This information would allow one to

form the basis of his or her experiment in trying to determine the concentrations of the

unlabeled solutions. The specifics of the experiment will be discussed along with the

results one would expect from such an experiment. However, it is also important to know

why these predictable results would occur. They will also be discussed.

In conducting the experiment it would be necessary to obtain dialysis tubing. This

would play the role of the semi-permeable membrane. This is important because without a

semi-permeable membrane substances other than water, such as glucose, could exit the

apparatus and throw off the results. Diffusion of the solutes would occur. Diffusion is the

flask and tied off at both ends. Space would be left for expansion of the bag. The bags

the bag subtracted from the final mass of the bag divided by the initial mass and then

gained the most mass would be the 0.8M solution. He would also be able to determine the

solutions would gain more mass while others would gain very little. A good equation to

one would expect. However, there is an explanation for why these results are obtained.

solute. Furthermore, water moves from areas that are hypotonic to areas that are

0.8M bag would gain the most mass in water while the other bags would gradually gain

determine which flask contains which solution. A simple but effective experiment could

four bags would be made (taking solution from each of the four flasks). These four bags

concentration. Each bag contains a higher solute concentration than the beaker they were

Approximate Word count = 839
Approximate Pages = 3 (250 words per page double spaced)

Category: Science

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