Lesson Objective Calculate the concentration of solutions in units of molarity Calculate the dilution of solutions in units of molarity. Solutions are made in various concentrations Concentration depends on the amount of solute dissolved in a given amount of solvent
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Ex) 2 mol/L = 2 M
Ex) 2 M solution of NaOHdescribes a solution in which every liter of solution contains 2 moles of NaOH
V = 500. mL
m= 102 g
Molar mass = 58.44 g/mol
M = ?
Ex) What is the concentration of a 500. mL salt solution containing 102 g of NaCl? (Molar mass of NaCl = 58.44 g/mol)
What is the molarity of an aqueous solution containing 40.0 g of glucose (C6H12O6) in 1.5L of solution?
How many grams of NaOH are present in a 2.5 M solution?
M1 = 2.0 M
V1 = 1.5 L
V2 = 4.0 L
M2 = ?
Ex) A 2.0 M solution of acid is diluted by increasing its volume from 1.5 L to 4.0 L. Calculate the molarity of the new solution.
5. Make sure the answer is reasonable
What volume of a 3.00 calculationsM KI stock solution would you use to make 0.300 L of a 1.25M KI solution?