Year 12s: what will be the first way you research your future options? >>

Molecular mass and mixing up molar solutions

Hi, I dont actually take A level chem so i'm sorry if this seems like a dumb question to you guys, but i figured i stood a better chance of gettin an answer in here than the biology forum! :p:

ok for an experiment i have to mix up a 1molar solution of sucrose, glucose and fructose.

as fructose an glucose have the same molecular mass i can do the same measurements for them right? (i'm using 362g of sugar then toppin p to 1dm³ with distilled water)
However as sucrose is a dissacharide its got the formula C12 H22 O11
so i obviously cant halve the amount of sugar cus the formula isn't hlaved, so i need to work out the molecular mass of 1 water molecule..
and then somehow convert it to grams or something so i know how many grams of sucrose to add.

I'm stuck, pls help!

Reply 1

vinny221

the RMM of sucrose is 342 hence 342g

Reply 2

~*Sar*~

so have i got the RMM for glucose n fructose wrong?

Reply 3

~*Sar*~

ok yeah i dno where i got 362 for glucose...

the RMM for glucose an fructose is 180 right?

so to make up a 1 molar solution would i add 180g of glucose/342g of sucrose to 1dm³ of distilled water ?