Molarity • Molarity is a measure of molar concentration

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Molarity • Molarity is a measure of molar concentration Molarity • Molarity is a measure of molar concentration. • Molarity equals moles over liters • 1 M = 1mol/L • The symbol M is read molar so “1 M HCl” is read “one molar hydrochloric acid”.

Sample problem #1 0. 0292 mol Cane sugar (sucrose)is dissolved in 0 Sample problem #1 0.0292 mol Cane sugar (sucrose)is dissolved in 0.200 L of water. What is the concentration of the sugar solution? Answer: 0.146 M sucrose

Basic Molarity Step-by-step 1 Basic Molarity Step-by-step 1. If you are given grams, turn it into moles. 2. If you are given a volume in units other than liters, convert to liters. 3. Plug the numbers into the equation M=mol/L and solve.

Sample Problem #2 • A student prepared a solution by dissolving 1 Sample Problem #2 • A student prepared a solution by dissolving 1.345 g of potassium nitrate, KNO3 in enough water to prepare 25.00 mL of solution. What is the molarity of the solute? • Answer: 0.5321 M KNO3

Try this in your seat • Calculate the molarity of sodium chloride in a solution made by dissolving 2.357 g NaCl in enough water to make 50.00 mL of solution. • Answer: 0.8066 M NaCl