Please could you give me the definite formula for endosmosis in raisins?

Question

Hi,

I am a teacher, but I have slight doubt regarding endosmosis in raisins. I would be thankful if anyone could me the definite formula. The formula I have is W2-W1/W1 x 100, or is it W2-W1/W2 x 100? Is it possible the result be more than 100%?
Thank you.

Philip John

Answer 1

I'm not sure what you are asking for. There are two slightly different definitions of endosmosis:
http://www.infoplease.com/dictionary/endosmosis

And I can't tell which applies to raisins as a whole (though I would guess you are dealing with the biological definition). I also don't understand the Ws in your question.

However, you might want to look at:
vision2000kota.com/Correspondence/Chapters/Biology/Water-Plant/1.pdf

Among other things, it does have formulas for osmotic pressure and material transfer rates.