Molarity, Molarity and Percent Concentration

I'll show YOU how it's done!
Example: What is the molarity of a solution prepared by dissolving 60.0 g of sodium hydroxide in enough water to make a total of 550 mL of solution?


Method:

• Calculate the number of moles of solute present.

  mol NaOH	=	60.0g NaOH	x	1 mol NaOH
  				40.0 g NaOH
  mol NaOH	=	1.5 mol NaOH

  
  
• Calculate the number of liters of solution present.

  L soln	=	550 mL	x	1 L	=	0.55 L soln
  				1000 mL

• Divide the number of moles of solute by the number of liters of solution.

  M	=	1.5 mol NaOH	=	2.7 M NaOH
  		0.55 L soln