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Chapter 13.1-13.4 problems. November 28, 2011. What IMF(s) is/are present when… a) KCl is dissolved in H 2 O b) carnauba wax dissolves in castor oil c) Methanol (CH 3 OH) vs CCl 4. Arrange the following in increasing solubility: A B C.

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Chapter 13 1 13 4 problems

Chapter 13.1-13.4 problems

November 28, 2011






Why will washing your face with soap make your face “dryer”? (clue: remember your lipbalm experiment)


  • When NH “dryer”? (clue: remember your 4Cl dissolves in water, the solution becomes colder…

  • Is ΔHsol’n >, < or = to 0?

  • Is ΔHlattice >, <, or = to ΔHhydration ?

  • Is the dissolution mostly due to ΔH or ΔS of mixing?


  • CHARGE DENSITY affects “dryer”? (clue: remember your ΔHhydration. Which one will have a higher (more negative) ΔHhydration?

  • Na+ , Rb+

  • Br-, I-

  • Ca2+, Na+




  • Henry’s Law constant ( “dryer”? (clue: remember your kH) of O2 in water at 20oC is 1.28 x 10-3 mol/L-atm.

  • How many grams will dissolve in 2.50 L H2O that is in contact with pure O2 at 1.00 atm?

  • How many grams will dissolve in 2.50 L H2O that is in contact with pure O2 at 0.209 atm?




  • How many grams of solubility (in molars) in water at 20NaCl more is needed to prepare a 100.0 mL of 0.1000 molal from 100.0 mL of 0.1000 molar NaCl solution?





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