# Chapt. 12 Solutions Sec. 1 Concentration. Units of Concentration I solvent + solute.

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Chapt. 12 Solutions Sec. 1 Concentration

Units of Concentration I solvent + solute

Units of Concentration II (3) Mole Fraction (Chapt. 6)

Units of Concentration III (4a) Mass Percent (4b) parts per xxx

Example: Unit Conversion The density of a 12.0% sulfuric acid (H 2 SO 4, molar mass = 98.08 g/mol) solution is 1.080 g/mL. What is: (a) the molarity of this solution? (easy) (b) the molality of this solution? (hard)

Student Problem Calculate (a) the molarity (easy) and (b) the mole fraction (hard) of alcohol (C 2 H 5 OH, MW = 46.07 g/mol), in a wine that has an alcohol concentration of 7.50 mass percent. Take the density of the solution to be 1.00 g/mL.

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