Chapter 13 1 13 4 problems
This presentation is the property of its rightful owner.
Sponsored Links
1 / 17

Chapter 13.1-13.4 problems PowerPoint PPT Presentation


  • 75 Views
  • Uploaded on
  • Presentation posted in: General

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: ABC.

Download Presentation

Chapter 13.1-13.4 problems

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Chapter 13 1 13 4 problems

Chapter 13.1-13.4 problems

November 28, 2011


Chapter 13 1 13 4 problems

  • What IMF(s) is/are present when…

    a) KCl is dissolved in H2Ob) carnauba wax dissolves in castor oil

    c) Methanol (CH3OH) vs CCl4


Chapter 13 1 13 4 problems

  • Arrange the following in increasing solubility:

    ABC


Chapter 13 1 13 4 problems

  • Which solvent will yield the highest concentration of NaCl?

    a) b)


Chapter 13 1 13 4 problems

  • Which will have the highest concentration in diethyl ether ( ) ?

    A. HCl (g) B. NaCl (s) C. H2O


Chapter 13 1 13 4 problems

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


Chapter 13 1 13 4 problems

  • When NH4Cl 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?


Chapter 13 1 13 4 problems

  • CHARGE DENSITY affects ΔHhydration. Which one will have a higher (more negative) ΔHhydration?

  • Na+ , Rb+

  • Br-, I-

  • Ca2+, Na+


Chapter 13 1 13 4 problems

  • Which best depicts the dissolution of NaI (exothermic)?


Chapter 13 1 13 4 problems

  • Which one best describes the enthalpy diagram of dissolving KBr in hexane?


Chapter 13 1 13 4 problems

  • Henry’s Law constant (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?


Chapter 13 1 13 4 problems

  • Express the concentration of concentrated HCl (12M)? Assume density of solution to be that of water: 1.00g/mL

  • Molality

  • %w/w

  • %v/v

  • Mol fraction


Chapter 13 1 13 4 problems

  • Argon makes up 0.93% by volume of air. Calculate its solubility (in molars) in water at 20oC and 1.0 atm. (kH of Ar is 1.5x10-3 mol/L-atm)


Chapter 13 1 13 4 problems

  • How many grams of NaCl more is needed to prepare a 100.0 mL of 0.1000 molal from 100.0 mL of 0.1000 molar NaCl solution?


Chapter 13 1 13 4 problems

  • How many grams of water must be evaporated from a liter of solution to make a 20%(w/w) MgBr2 to make a 0.0010 molar solution?


Chapter 13 1 13 4 problems

  • You are to prepare 10.0mL 0.0430 M ethanol solution from a stock solution of 20% v/v ethanol. The density of ethanol is 0.789g/mL. How many mL of the stock solution should you use?


Chapter 13 1 13 4 problems

  • Air is 21%(w/w) oxygen. If the molar mass of air is 28.4 grams/mol, calculate the mol ratio of oxygen in the air.


  • Login