Quote:
|
Originally Posted by charco
Just a little clarification...
Solution concentration is measured in the units per volume of solution NOT water (i.e. moles/litre solution or g/litre solution or g/100cm3 solution)
|
You are partially mistaken charco. Molarity is indeed moles of solute per liter of solution, and mass percent is mass of solute per mass of solution, but molality is moles of solute per kg of solvent. Whether or not solution or solvent is in the denominator varies. It's not always solution.
My general chemistry textbook does not describe mass per volume concentrations. It has moles per liter, moles per kg, mass per mass, volume per volume, and moles per moles.
I'll try to look this up.
This website suggests that it's grams of solute per liter of solution, like you suggest, charco:
http://dbhs.wvusd.k12.ca.us/webdocs/...GramSolub.html
This website seems to agree:
Percentage weight in volume (w/v) expresses the number of grams of solute in 100 ml of solution.
http://www.cop.ufl.edu/safezone/prok...solubility.htm
In this case, it looks like charco is right - it's grams of solute over volume of solution.