RelativeResourceManager1

RelativeResourceManager1 - Chapter 12 Solutions...

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Chapter 12 Solutions Concentration units and conversions between them Principles of solubility – Solute-Solvent interactions – Effect of temperature – Effect of pressure Colligative properties – Vapor pressure lowering – Boiling point elevation – Freezing point lowering – Osmotic pressure – Electrolyte effect
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Minimum Homework Problems Chapter 12 3, 11, 19, 21, 25, 29, 33, 43, 45, 59, 63, 65, 69, 71, 73, 83
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Quantitative ways of expressing concentration Concentration is the proportion of a substance in a mixture intensive property - one that does not depend on quantity Concentration is most often the ratio of the quantity of solute to the quantity of solution It is the ratio of two extensive properties – depends on quantity
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Concentration Units molarity mole fraction % composition ppm molality
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Calculate the molality of a solution containing 16.5 grams of naphthalene (C 10 H 8 ) in 53.3 grams of benzene (C 6 H 6 )?
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What is the molarity of 7.8 grams of calcium carbonate diluted with water to 500-mL in a volumetric flask? How many grams of NaOH are in 2.0 L of 0.075 M NaOH?
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What is the % (w/w) of 2.66 grams of carbon tetrachloride (d = 1.59 g/ mL) in 76.5 grams of methylene chloride (CH 2 Cl 2 , d = 1.33 g/ mL)? What is the % (w/v)? Assume volumes are additive.
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Calculate the molality, molarity and mole fraction of FeCl 3 in a 28.8% (w/w) aqueous solution (d = 1.280 g/mL).
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Dilution If we dilute a solution, the number of moles of solute remains the same after dilution as before dilution; we can then use this relationship: M stock V stock = M dilute V dilute
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M stock V stock = M dilute V dilute How do you prepare 200. mL of 3.5 M aqueous solution of acetic acid if you have a bottle of 6.0 M acetic acid?
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This note was uploaded on 01/23/2012 for the course CHEM 1212 taught by Professor Dockery during the Spring '08 term at Kennesaw.

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RelativeResourceManager1 - Chapter 12 Solutions...

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