Homework Help: Science_Chemistry

Posted by Samantha on Monday, May 2, 2011 at 11:05am.

A glucose (C6H12O6) solution is 2.5% glucose by mass. If the density of the
solution is 1.10 g/mL, what is the molarity of glucose/water solution?

Science_Chemistry - bobpursley, Monday, May 2, 2011 at 11:24am
assume 1000grams. Then glucose is 25grams, and water 975 grams.
volume+ 1000/1.1=909 ml

molarity= (25/molmassglucose)/.909
Science_Chemistry - Samantha, Monday, May 2, 2011 at 11:49am
How did you get the amount of water?
Science_Chemistry - Samantha, Monday, May 2, 2011 at 11:54am
volume+ 1000/1.1=909 ml? I don't get this...

I understand how you got the water
Science_Chemistry - bobpursley, Monday, May 2, 2011 at 12:00pm
you have 1000 total grams, the density is 1.1g/ml, so volume= 1000/1.1 ml
Science_Chemistry - Samantha, Monday, May 2, 2011 at 12:07pm
Oh... I get it now! Thank you very much. Your help is greatly appreciated.

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