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Ch. 3 & 7 – The Mole II. Molarity (p )

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**substance being dissolved**

A. Molarity Concentration of a solution. substance being dissolved total combined volume

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A. Molarity 2M HCl What does this mean?

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**B. Molarity Calculations**

6.02 1023 (particles/mol) molar mass (g/mol) MASS IN GRAMS MOLES NUMBER OF PARTICLES LITERS SOLUTION Molarity (mol/L)

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**B. Molarity Calculations**

How many grams of NaCl are required to make 0.500L of 0.25M NaCl? 0.500 L 0.25 mol 1 L 58.44 g 1 mol = 7.3 g NaCl

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**B. Molarity Calculations**

Find the molarity of a 250 mL solution containing 10.0 g of NaF. 10.0 g 1 mol 41.99 g = mol NaF 0.238 mol 0.25 L M = = 0.95M NaF

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Solutions Concentration of Solutions. Objectives 1.Define molarity and calculate its value. 2.Define molality and calculate its value. 3.Apply the principles.

Solutions Concentration of Solutions. Objectives 1.Define molarity and calculate its value. 2.Define molality and calculate its value. 3.Apply the principles.

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