2 replies to this topic

[Loris]

Hi,

I have a liquid that has a molecular weight of 108.16 g/mol.  I need a final concentration of 4.5 x 10^-4 M.  How do I find out the initial molarity (mol/L) of my liquid?  Is there any information I'm missing?

Thanks!

[Ahrenhase]

Loris, on May 8 2009, 03:47 PM, said:

Hi,

I have a liquid that has a molecular weight of 108.16 g/mol.  I need a final concentration of 4.5 x 10^-4 M.  How do I find out the initial molarity (mol/L) of my liquid?  Is there any information I'm missing?

Thanks!

it depends on how many grams are in your initial solution.  g/mol is a measure of mass per quantity, mol/L is a measure of quantity to volume.  A volume of feathers has a different mass than the same volume of lead.

[K.B.]

Loris, you need the density of your liquid.