Monday, Per.



Solutions

|Day 1 |5.1, 5.3, 5.4, 5.6 |Introduction to Solutions |Demonstration: Dissolve several substances in water to |Warm-Up: Do you remember what a |

| | |Water as a solvent |demonstrate solubility and saturation |solution is? List five things you can |

| | |Unique properties of aqueous solutions |Demonstration: Crystallize super-saturated sodium |remember. |

| | |What is solubility? |acetate solution |Homework: Worksheet identifying which |

| | |What determines whether or not a substance is soluble? |Use your knowledge of kinetic theory to theorize how each|factors are affecting solubility for |

| | |Measuring solubility – mass/molar solubility |listed factor affects the solubility of a particular |each given situation – to be used as |

| | |Solubility curves |substance in water? |warm-up on day 2 |

| | |Saturation and super-saturation |How do these factors change the shape of the solubility | |

| | |Mechanism for dissolving solutes |curve? | |

| | |Factors affecting solubility | | |

| | |Temperature | | |

| | |Pressure | | |

| | |Surface area of solute | | |

| | |Agitation | | |

| | |Presence of an acid/base | | |

| | |Common ions | | |

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| | |Students will be introduced to the qualitative properties of | | |

| | |solutions to set a foundation for the quantitative analysis. | | |

| | |Students should be engaged in a discussion with the instructor | | |

| | |during which the instructor asks questions that draws on their | | |

| | |previous experiences with solutions. | | |

|Day 2 |5.1, 5.3, 5.4, 5.6 |Quantitative analysis of solutions |Calculating molarity and molality |Warm-Up: Discuss homework from the |

| | |Quantitative concentration |Determining percent solute by mass, percent solute by |previous day |

| | |Units of concentration |moles |Homework: Practice calculations |

| | |Molarity |Use density to determine concentration | |

| | |Molality |Laboratory – Determining solubility of an unknown salt | |

| | |Percent by mass | | |

| | |Percent by moles | | |

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| | |Students will use mathematics to quantify concentration. They will| | |

| | |work collaboratively to check their computations against each | | |

| | |other, and will submit their work for evaluation by the instructor.| | |

|Day 3 |5.1, 5.3, 5.4, 5.6 |Preparation of solutions |Derive a procedure to prepare a solution |Warm-Up: What things do you need to |

| | |Dilutions |Calculations to prepare solutions |know to prepare a solution? To dilute |

| | | |Calculations to dilute solutions |a solution? |

| | |Students will be given an introduction to the math required for | |Homework: Practice calculations |

| | |preparing and diluting solutions, and will be asked to draw on the | | |

| | |work from the previous day to derive a procedure for calculating | | |

| | |the solute required to prepare a solution of specified | | |

| | |concentration. Students will also be asked to use what they now | | |

| | |know to determine a way to calculate the molarity of a diluted | | |

| | |solution. | | |

|Day 4 |5.1, 5.3, 5.4, 5.6 |Colligative properties of solutions |Theorizing about the effect of solutes on the properties |Warm-Up: How are the properties of a |

| | |Vapor Pressure Lowering |of solvents |solvent affected by the presence of a |

| | |Freezing Point Depression |Calculating moles of particles in solution |solute? |

| | |Boiling Point Elevation |Diagrams of layers of solvation |Homework: Practice calculations |

| | | |Colligative properties calculations | |

| | |Students will be presented with the definition of a colligative | | |

| | |property and the names of the three properties to be analyzes. | | |

| | |They will then be asked to use their knowledge of the properties of| | |

| | |water, hydrogen bonding, and the process of solutes entering | | |

| | |solution to theorize what effect solutes might have on a quantity | | |

| | |of solvent. The instructor will then engage the class in a | | |

| | |discussion in which they must defend their ideas, and will plant | | |

| | |bits of information when necessary to help them revise their ideas.| | |

| | |This will then be used to help them determine the math that might | | |

| | |be involved, followed by a demonstration of calculations and a | | |

| | |follow-up homework. | | |

Comments for 2007: Day 4 needs to be spread out to several days with extra help with calculations. This simply isn’t enough time to allow the students to collaborate and practice so that they can master the material.

|Day 5 |5.1, 5.3, 5.4, 5.6 |Coilligative properties minilab |Calculations to prepare solutions |Warm-Up: Minilab introduction |

| | | |Preparation of solutions |Homework: Study for examination |

| | | |Dilution of solutions | |

| | | |Collaborative work | |

Comments for 2007: More practice will colligative properties calculations needed before performing the minilab. Many students had questions about setting up the multiple steps required to arrive at a freezing point depression or boiling point elevation.

|Day 6 |5.1, 5.3, 5.4, 5.6 |Unit examination |Examination |Examination |

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