Molarity Thornburg 2014.

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Molarity Thornburg 2014

Molarity provides a way to measure the concentration of a solution Molarity (M) = moles of solute Liters of Solution Thornburg 2014

Step 1 - Calculate the molar mass of NaOH Na = 23.0 H = 1.0 O = 16.0 Sample Problem: Determine the molarity of a solution made by dissolving 20.0 g of NaOH in sufficient water to yield a 482 mL solution. Step 1 - Calculate the molar mass of NaOH Na = 23.0 H = 1.0 O = 16.0 1 mol NaOH = 23.0 g + 16.0 g + 1.0 g = 40.0 g Thornburg 2014

Step 2 - Calculate the number of moles of solute 20.0 g x 1 mol = 0.500 mol 40.0 g Step 3 - Convert the volume of solvent into Liters 1 liter is 1000 mL, so the volume of solution is: 482 mL x 1 liter = 0.482 liter 1000 mL Thornburg 2014

Step 4 - Plug these values into your equation M = 0.500 mol = 1.04 mol/liter 0.482 liter Answer = 1.04 M Thornburg 2014