Wednesday, October 12, 2016

Egg Diffusion Lab


In this lab we looked at osmosis and diffusion by putting two different eggs in solutions of deonized water and corn syrup. We were testing the difference between hypertonic and hypotonic solutions by seeing hoe keeping the egg in the solution would affect it. The definition of Diffusion is when the solvents go from a low concentration to a high concentration of water to the equilibrium, or even point. This is called passive diffusion when it doesn't require the cell to use energy The water inside the eggs left to the outside, in the sugar water beaker, making the egg shrink and colapse on itself in places. In comparison, when left in the deonzied water, the egg grew as the solvents in the water infiltrated the eggs membrane and filled the egg making its percent of  change 7.78. This as well as the fact that the mass' percent of  change was .44 grams shows diffusion and proves the difference between hypertonic and hypotonic solutions. 

Grocers in a market sprinkle their produce with water to prevent them from shrinking and losing its inner moisture in the sun, as well as simply dehydrating. Roads are sprayed with salt when it is wet or covered in snow because the salt melts and dries the road out, making it safer to travel on. When it is mixed with plants, the salt dries the plants out killing them as plants require water void of salt to hydrate it. That is also why humans cannot drink salt water, because salt dehydrates us. 

Since this lab proved that putting a egg in a hypertonic solution makes it shrink, does putting it back in hypotonic solution make it grow again? Theoretically it should, since the converse of the definition of hypertonic states that it would grow, but in real life would it be possible? Does putting a dehydrated grape in a solution of water revive it? I would really like to test that, even though based on life experiences, I can hypothesize the answer would be no.

Here are some side by side pictures comparing the eggs we tested.



 In both the pictures, there is clear difference between the eggs as one is shrinked and the other filling the beaker completely.

Here is the data table our class shared with the average percent of change :



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