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Catalyst

Catalyst. End. Which tastes the strongest?. Justify – TPS. Why did the cup you picked taste the strongest? What was different about it from the other cups?. Lecture 3.4 – Solution Chemistry. Today ’ s Learning Targets. LT 3.5 – I can identify the solute and solvent in a given solution.

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Catalyst

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  1. Catalyst End

  2. Which tastes the strongest?

  3. Justify – TPS • Why did the cup you picked taste the strongest? What was different about it from the other cups?

  4. Lecture 3.4 – Solution Chemistry

  5. Today’s Learning Targets • LT 3.5 – I can identify the solute and solvent in a given solution. • LT 3.6 – I can calculate the molarity and percent composition of a solution and discuss what the final concentration indicates. • LT 3.10 – I can analyze a substances molarity and determine the number of grams of a compound that are contained within a solution.

  6. How do we describe solutions?

  7. I. Solute and Solvent • The solventis the substance in which the solute is dissolved and is primary ingredient in a solution. • The soluteis the substance that is dissolved in the solvent.

  8. II. Solute and Solvent • Water is the universal solvent. • If ever there is a solution that is water and another compound, then the solvent is always water.

  9. How do we calculate molarity?

  10. I. Concentration • The concentration of a solution is the amount of a particular substance in a given quantity of solution.

  11. II. Molarity • Molarityis a concentration unit of a solution expressed as moles of solute dissolved per liter of solution.

  12. Class Example • I have 72 g of HCl that I dissolved in 4 L of solution. What is the molarity of this final solution?

  13. Table Talk • In order to torture this gummy bear you need you make a solution of KClO3 you dissolve 1,220 g of KClO3 in 1 L of water. What is the molarity of your final solution?

  14. SUMMARIZE

  15. White Board Races

  16. Question 1 • You have a solution that is sugar dissolved in water. What is the solute in this solution?

  17. Question 2 • You have a solution of naphthalene dissolved in methanol. What is the solvent?

  18. Question 3 • You have 82 g of NaOH and you dissolve it in 4 L. What is the molarity of the solution?

  19. Question 4 • You have 52 g of H2SO4 dissolved in 0.5 L. What is the molarity of the solution?

  20. Question 5 • You have 52 g of CaCl2 dissolved in 0.1 L. What is the molarity of the solution?

  21. How do we determine grams from molarity?

  22. I. Hold Up! We Can Work in Reverse • We can work backwards if we have a molarity and volume of solution. • From this we can determine both the moles and mass of our solute Molarity of the solution Molar Mass of solute

  23. Class Example • If you have a 3 L of a 0.6 M solution of AgNO3, then what mass of AgNO3 is contained in this solution?

  24. Table Talk • If all the water in 430 mL of a 0.45 M NaCl solution evaporates, what mass of NaCl remains?

  25. How do we calculate percent composition?

  26. I. Percent Composition • Percent compositionconveys the concentration in terms of percent of solute in a solution.

  27. Class Example • A 4 g sugar cube (Sucrose: C12H22O11) is dissolved in a 350 g of water. What is the percent composition by mass of the sugar solution that is created?

  28. Table Talk • You have 5 moles of NaCl and you dissolve this in 500 g of water, what is the concentration of this solution in terms of percent composition?

  29. SUMMARIZE

  30. Connect 4 • With a partner you will be using the connect 4 sheet to practice problems. • Silently read through the directions on the sheet in front of you

  31. Closing Time • Homework 3.6 due Tuesday/Wednesday

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