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ratio of product / reactantModerator: BioTeam
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ratio of product / reactantHello Everyone.
I'm stuck on a few questions. But since they are long, I will post one at a time. I'm just working on a study workbook that was recommended for my biology class, but i can only get half way done the problems. I hope you can help. 1. For the reaction: dihydroxyacetone phosphate <> glyceraldehyde 3phosphate Delta G' = 1.8kcal/mol (I'll use this symbol ^ for delta) What ratio of product/reactant must be maintained in order to keep the rxn going in a forward direction? So this is what I've got so far ( and the back of the book shows the answer, but it doesnt show all the steps so it loses me near the end) ^G' < 0 ^G' + 2.303 RT Log (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 0 1.8 kcal = 1800 cal 1800 cal/mol + (2.303) (1.987cal/mol K) (298K) log (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 0 1364 Log (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 1800cal/mol Log (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 1800 / 1364 Log (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 1.32cal/mol Then from here I dont know how to get rid of "log" The final answer says it should be (glyceraldehyde 3phosphate) / (dihydroxyacetone phoshate) < 0.048 cal/mol How did it go from 1.32 cal to 0.048 cal Please help.
LOL, that's all what you need? Just convert logarithm to normal number?
log (10^x) = x ^ here means power, so you can have like: log 100 = log (10^2) = 2 pretty simple, isn't it? (of course, this is decimal logarithm, but the basis can be any) http://www.biolib.cz/en/main/
Cis or trans? That's what matters.
Log is a logarithm:
explanation in wikipedia: http://en.wikipedia.org/wiki/Logarithm basic maths skills are useful in biology, you know? Patrick
Science has proof without any certainty. Creationists have certainty without any proof. (Ashley Montague)
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