Molarity Concentration / "Molarity" of Solutions

Molar Concentration

Here's a quick review of a past chapter:

Homogeneous mixture, when one substance is dissolved in another it is called a solution.

• the smaller quantity (being dissolved) is called a solute
• the larger quantity (dissolving) is called a solvent

Ex: sugar in tea
The sugar would be the solute and the tea is the solvent.

Molar Concentration / Molarity is the number of moles of solute in one litre of a solution. We use the letter "M" to represent molar concentration, which has the units of "moles/L"

Formulae:

         - Molarity= moles of solute (mol)
                           volume of solution (L)

         - or put more simply:  M=mol
                                                 L

         - mol= MxL           and           L=mol
                                                            M

      
Check out this link for some more help :)

http://www.youtube.com/watch?v=h0cdLIfus8c

Try a practice problem :

Find the molar concentration of a solution that has 0.310 moles of LiOH² in 1.200 L of solution.

-Lauren