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# Percent Concentrations

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Sections
Solutions
Solubility and Intermolecular Forces
Solutions: Mass Percent
Percent Concentrations
Molarity
Osmolarity
Parts per Million (ppm)
Solubility: Temperature Effect
Intro to Henry's Law
Henry's Law Calculations
Dilutions
Solution Stoichiometry
Electrolytes (Simplified)
Equivalents
Molality
The Colligative Properties
Boiling Point Elevation
Freezing Point Depression
Osmosis
Osmotic Pressure

Percent Concentrations deal with the amount (in mass of volume) of solute found within a given solution.

###### Mass and Volume Concentrations

Concept #1: Mass/Volume Percent Concentration

Example #1: A solution was prepared by dissolving 13.5 g of KNO3 in sufficient water to produce 85.0 mL of solution. What is the (m/v) % of this solution?

Concept #2: Volume Percent Concentration

Example #2: A 750.0 mL bottle of Listerine contains 150 mL of ethanol. What is the (v/v) % of this Listerine cleaning solution?

Practice: How many mL of ethanol are contained in a 750.0 mL bottle of wine that contains 11.0% (v/v) of ethanol?

Practice: Calculate the grams of solute needed to prepare the following: 450 mL of a 2.0% m/v KOH solution.

Practice: What is the mass/volume percent concentration of the following solutions: 0.075 mol sucrose (C12H22O11) in 270 mL of solution.

Practice: The pain reliever ibuprofen is sold as an oral suspension for children 2-11 years of age. How many milligrams would you obtain in a 2.7 tsp dose if it contains 100 mg per 5 mL? (1 tsp = 5 mL)