1. Chapter 8 Molarity Part 1

2. Solutions Solute The substance that dissolves (the minor component of a solution). KMnO 4

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

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

5. Solutions Dilute Concentrated

6. Concentration of a solution Molarity(M) is the moles of solute per liter of solution. Molarity(M) = moles of solute 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 dm 3 solution

9. a a How to prepare 1.000L of a 1.0000M solution of Na 2 SO 4.

10. Molarity Calculate the molarity of an aqueous Ba(NO 3 ) 2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution.

11. Molarity Calculate the molarity of an aqueous Ba(NO 3 ) 2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO 3 ) 2 0.931 L

12. Molarity Calculate the molarity of an aqueous Ba(NO 3 ) 2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO 3 ) 2 0.931 L261.3 g mol

13. Molarity Calculate the molarity of an aqueous Ba(NO 3 ) 2 solution containing 0.283 grams of barium nitrate in 0.931 L of solution. 0.283 g Ba(NO 3 ) 2 0.931 L261.3 g mol = 0.00116 mol Ba(NO 3 ) 2 /L = 0.00116 M Ba(NO 3 ) 2

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. 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 500.0 mL40.0 g mol

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 500.0 mL40.0 g mol 0.001 L mL

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 500.0 mL40.0 g mol 0.001 L mL = 0.20 mol NaOH/L = 0.20M NaOH

20. How many grams of Na 2 SO 4 are required to prepare 1000.0 mL of 1.0000 M Na 2 SO 4 solution?

21. 1000.0 mL

22. How many grams of Na 2 SO 4 are required to prepare 1000.0 mL of 1.0000 M Na 2 SO 4 solution? 1000.0 mL 0.001 L mL mL

23. How many grams of Na 2 SO 4 are required to prepare 1000.0 mL of 1.0000 M Na 2 SO 4 solution? 1000.0 mL 0.001 L 1.0000 mol Na 2 SO 4 mL L mL L

24. How many grams of Na 2 SO 4 are required to prepare 1000.0 mL of 1.0000 M Na 2 SO 4 solution? 1000.0 mL 0.001 L 1.0000 mol Na 2 SO 4 142.04 g mL L mol mL L mol

25. How many grams of Na 2 SO 4 are required to prepare 1000.0 mL of 1.0000 M Na 2 SO 4 solution? 1000.0 mL 0.001 L 1.0000 mol Na 2 SO 4 142.04 g mL L mol mL L mol = 142.04 g Na 2 SO 4

26. Information for Mole Quiz How does a mole relate to particles and mass? (ie. One mole of H 2 O is 6.02 x 10 23 H 2 O 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.