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Molarity Calculation and Solutions

Learn about molarity and how to calculate the concentration of solutions. Explore examples of molarity calculations with different solutes and solvents.

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Molarity Calculation and Solutions

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  1. Chapter 8 Molarity Part 1

  2. Solutions Solute • The substance that dissolves (the minor component of a solution). KMnO4

  3. Solutions • Solvent • The substance that the solute dissolves in (the major component of a solution).

  4. Solution A homogeneous mixture of the solute and solvent. KMnO4 solution

  5. Solutions Dilute Concentrated

  6. Concentration of a solution Molarity(M) is the moles of solute per liter of solution. moles of solute Molarity(M) = Liters of solution

  7. Common Volume Units = 1000 mL

  8. Units of Molarity 2.0 M HCl = 2.0 moles HCl L solution 6.0 M HCl = 6.0 moles HCl dm3 solution

  9. How to prepare 1.000L of a 1.0000M solution of Na2SO4. a a

  10. Molarity • Calculate the molarity of an aqueous Ba(NO3)2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution.

  11. Molarity • Calculate the molarity of an aqueous Ba(NO3)2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO3)2 0.931 L

  12. Molarity • Calculate the molarity of an aqueous Ba(NO3)2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO3)2 mol 0.931 L 261.3 g

  13. Molarity • Calculate the molarity of an aqueous Ba(NO3)2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO3)2 mol = 0.00116 mol Ba(NO3)2/L = 0.00116 M Ba(NO3)2 0.931 L 261.3 g

  14. Molarity Calculation NaOH is used to open stopped sinks, to treat cellulose in the making of nylon, and to remove potato peels commercially.

  15. If 4.0 g NaOH are used to make 500.0 mL of NaOH solution, what is the molarity (M) of the solution?

  16. If 4.0 g NaOH are used to make 500.0 mL of NaOH solution, what is the molarity (M) of the solution? 4.0 g NaOH 500.0 mL

  17. If 4.0 g NaOH are used to make 500.0 mL of NaOH solution, what is the molarity (M) of the solution? 4.0 g NaOH mol 500.0 mL 40.0 g

  18. If 4.0 g NaOH are used to make 500.0 mL of NaOH solution, what is the molarity (M) of the solution? 4.0 g NaOH mol mL 500.0 mL 40.0 g 0.001 L

  19. If 4.0 g NaOH are used to make 500.0 mL of NaOH solution, what is the molarity (M) of the solution? 4.0 g NaOH mol mL = 0.20 mol NaOH/L = 0.20M NaOH 500.0 mL 40.0 g 0.001 L

  20. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution?

  21. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution? 1000.0 mL

  22. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution? 1000.0 mL 0.001 L mL

  23. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution? 1000.0 mL 0.001 L 1.0000 mol Na2SO4 mL L

  24. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution? 1000.0 mL 0.001 L 1.0000 mol Na2SO4 142.04 g mL L mol

  25. How many grams of Na2SO4 are required to prepare 1000.0 mL of 1.0000 M Na2SO4 solution? 1000.0 mL 0.001 L 1.0000 mol Na2SO4 142.04 g mL L mol = 142.04 g Na2SO4

  26. Information for Mole Quiz • How does a mole relate to particles and mass? (ie. One mole of H2O is 6.02 x 1023 H2O molecules and has a mass of 18.0 g). • Be able to use the factor-label method to do metric conversions and mole problems. • Know how to determine the number of atoms in a molecule. Be able to use this information in factor-label problems. • Be able to determine the number of grams/molecule. • Identify the diatomic gases.

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