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gmccoy1 · Sep 3, 2008, 09:15 AM

If you were presented with 2 L of a 2 M sucrose stock solution, how many grams of sugar would be in a 100 mL aliquot?

jem02081 · Sep 3, 2008, 08:46 PM

You need to know the formula (= molecular) weight of sucrose =342 grams per mole
& you need to understand the concept of a mole.

1 L of a 1 M solution will contain 343 gm of sucrose
... a 2 M solution will have twice as much ( 686 gm in a liter)

The volume (2 L) doesn't matter. It's just an attempt to make the question appear harder.

asking · Sep 3, 2008, 08:59 PM

But the 100 mL matters, right?

jem02081 · Sep 4, 2008, 05:03 PM

Right, 100 ml is 1/10 of a liter
So, if you have 343 gm in 1 liter how much do you have in 1/10 of a liter

OK?