Day 2 Egg Lab

Wednesday November 14th

The vinegar that we placed the egg in yesterday is a very small molecule, small enough to fit between the phospholipids.  With that said, what do you think happened to the egg and the vinegar last night?

Since the vinegar is small enough to fit between phospholipids and there is a concentration difference inside and outside of the cell we would assume that vinegar could move into the egg.
 

What about the membrane would determine if the vinegar could cross the cell membrane?

We know that cell membranes are said to be semi or selectivaly permeable.  This means that only CERTAIN substances can flow through the membrane.  What would determine if vinegar could?  The permeability of the membrane.
 

We placed plastic wrap on the beaker yesterday, why do you think we may have done this? (think about proper experimentation).  We would do this to make sure that the experiment is valid.  We saw that there was less vinegar in the beaker today than yesterday.  The ONLY way to explain this is if everything else about the experiment was constant.  If we had not, then we couldn't properly conclude that the vinegar went into the egg - it could have just evaporated.

We then set about on day 2 of the egg lab! - Day  2 included taking the egg out of vinegar and moving it into corn syrup.  Again you made predictions as to what you think will happen to the egg over night.

We took the egg out of the vinegar and noticed that it was bloated
and felt a bit like a water balloon.

After weighing we notitced that it had gained mass and
then we started the task of taking the shell off

Most of you were able to get most of the shell off, even
if not this will still work