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Solution Concentration

Solution Concentration. Solution concentration. A way to indicate the amount of solute in a given amount of solvent. Qualitative: Concentrated: A lot of solute in solution Dilute: Very little solute present in solution. Quantitative. Molarity Mass percent Molality. Mass percent.

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Solution Concentration

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  1. Solution Concentration

  2. Solution concentration • A way to indicate the amount of solute in a given amount of solvent. • Qualitative: • Concentrated: • A lot of solute in solution • Dilute: • Very little solute present in solution.

  3. Quantitative • Molarity • Mass percent • Molality

  4. Mass percent • The percent by mass of solute in a solution. Mass % = Mass solute X 100 Mass solution

  5. What is the mass percent of a solution made by dissolving 14.5 g NaCl in 167.0 g H2O? Mass % = Mass solute X 100 Mass solution

  6. Molarity (M) Molarity is moles of solute per liter of solution. M = Moles solute Liters of solution 6 M HCl

  7. What is the molarity of a solution made by dissolving 14.5 g NaCl in enough H2O to make 134.0 mL of solution?? M = Moles solute Liters of solution

  8. To make a solution of a given Molarity: • Find moles of solute needed by multiplying the concentration and volume (in L) of the desired solution. • Change moles of solute to grams. • Dissolve ______g of solute (#2) in enough solvent to make the desired volume. Volumetric flask

  9. How would you make 120.0 mL of a 2.56 M Mg(OH)2 solution?

  10. Molality (m ) Molality is moles of solute per kilogram of solvent. m = Moles solute Kg of solvent 6 m C6H12O6

  11. What is the molality of a solution made by dissolving 45.5 g C12H22O11in 150.0 g of H2O? m = Moles solute Kg of solvent

  12. Solution Concentration: Mass Percent Mass % = Mass solute X 100 Mass solution Molarity M = Moles solute Liters of solution Molality m = Moles solute Kg of solvent

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