Molarity Problems
 Procedure:   Give the formula for molarity. A molarity problem has given you the mass of the solute, in grams. What must be done to solve the problem?A molarity problem gives you the volume of the solution in mL. What must be done to solve the problem? Terms and Definitions: What is a solute? What is a solvent? What type of mixture is a solution, heterogeneous or homogeneous? Explain. You might recall the scene in the movie “Men in Black” where the alien/farmer asks his wife for sugar. Using the appropriate terms (solute, solvent, solution), describe how she gave him want he requested. 37.5 g of NaOH is dissolved in enough water to create 500. mL of solution. What is the molarity of the solution? How many grams of LiCl are needed to create 1.50 L of 2.50 M LiCl? What is the volume of solution (in mL) that will contain 0.50 mole of 3.0 M NaOH? How many grams of MgF2 are needed to prepare 250 mL of 1.50 M MgF2? How many moles of KNO3 are needed to create 500. mL of 6.0 M KNO3? What volume (in Liters) of 4.50 M HCl will contain 0.25 moles of HCl? A bottle is labeled “3.0 M HCl”. Another bottle is labeled “0.1 M HCl”. Which bottle contains the more concentrated acid? Tell how you would explain what the labels mean to someone who hadn’t taken chemistry.

E Saylor

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