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Chapter 20

Chapter 20. Concentration. Molarity (M). Moles of solute per liter of solution. moles of solute. Molarity =. liters of solution. What is the molarity of a solution prepared by dissolving 21.0 g of CaCl 2 in 500.0 mL of solution?.

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Chapter 20

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  1. Chapter 20 Concentration

  2. Molarity (M) • Moles of solute per liter of solution. moles of solute Molarity = liters of solution

  3. What is the molarity of a solution prepared by dissolving 21.0 g of CaCl2 in 500.0 mL of solution?

  4. What is the molarity of a solution prepared by dissolving 21.0 g of CaCl2 in 500.0 mL of solution? 0.378M CaCl2

  5. What is the molarity of a solution prepared by dissolving 48.4 g of CaCl2 in 100.0 mL of solution?

  6. What is the molarity of a solution prepared by dissolving 48.4 g of CaCl2 in 100.0 mL of solution? 4.36M CaCl2

  7. molality (m) • Moles of solute per kilogram of solvent. moles of solute molality = kg of solvent

  8. What is the molality of a solution prepared by dissolving 92.3 g of KF in 100.0g of water?

  9. What is the molality of a solution prepared by dissolving 92.3 g of KF in 100.0g of water? 15.9m KF

  10. What is the molality of a solution prepared by dissolving 20.0g of NH4Cl in 400.0g of water?

  11. What is the molality of a solution prepared by dissolving 20.0g of NH4Cl in 400.0g of water? 0.935m NH4Cl

  12. Mole Fraction (X) • moles of component per total moles of solution. moles of component mole fraction = total moles in solution Note: The mole fractions of the solute and solvent add up to “1”

  13. What is the mole fraction of C4H10O in a solution containing 75.6g of C10H8 and 600.0g of C4H10O?

  14. What is the mole fraction of C4H10O in a solution containing 75.6g of C10H8 and 600.0g of C4H10O? XC4H10O = 0.932

  15. What is the mole fraction of C2H6O in a solution containing 67.4g of C9H7N and 200.0g of C2H6O?

  16. What is the mole fraction of C2H6O in a solution containing 67.4g of C9H7N and 200.0g of C2H6O? XC2H6O = 0.893

  17. Percent Solution by mass • Represents the number of grams of solute per 100 grams of solution. mass of solute % solution = X 100 mass of solution

  18. A solution contains 130g of HCl in 750g of water. What is the percent by mass of this HCl solution?

  19. A solution contains 130g of HCl in 750g of water. What is the percent by mass of this HCl solution? 14.8% HCl

  20. What is the mass percent of a solution containing 67.4g of C9H7N in 200.0g of C2H6O?

  21. What is the mass percent of a solution containing 67.4g of C9H7N in 200.0g of C2H6O? 25.2% C9H7N

  22. Homework • Worksheet: Concentration

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