chem-201-chapter-1 - 1 Concentration Units Molarity defined...

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Unformatted text preview: 9/29/11 1 Concentration Units Molarity: defined as moles of solute per liter of solution L mol solution of liters solute moles M = = The volume used in the denominator is the total volume of the solution, not just the volume of the solvent However, the volume of the solute is often negligible compared to the solvent volume Concentration Units Molality: defined as moles of solute per mass of solvent kg ¡O¢ SO¢vENT OF ki¢OgRa¡S SO¢UTE ¡O¢ES ¡ = = In this case, the mass is only the mass of the solvent, not the total mass of the solution Concentration Units Mole fraction: mole fraction is defined as the number of moles solute divided by the total number of moles of all species in the solution £o£ A A n n ¤ol¥£ion in mol¦¤ £o£§l ¤ol¥£¦ mol¦¤ X = = Mole fraction is a unitless number Concentration Units Parts-per-million (ppm) and parts-per billion (ppb) For dilute aqueous solutions, we can make the assumption that the density of the solution is 1.00 g/mL ppm and ppb express the...
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chem-201-chapter-1 - 1 Concentration Units Molarity defined...

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