1 / 22

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?.

stu
Download Presentation

Chapter 20

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  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

More Related