Phase Diagram Worksheet - Download as DOC - DOC

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Phase Diagram Worksheet - Download as DOC - DOC Powered By Docstoc
					Unit 6  Concentration Molarity, Dilution and Molality
                                                               Problem          Set 6-3

   1. What is the molality of a solution prepared by dissolving 5.00 g of chlorobenzene,
      C6H5Cl, in 115 g of benzene, C6H6?




   2. What is the molality of a solution prepared by dissolving 8.87 g of methanol, CH3OH,
      in 20.0 g of water?




   3. Vanillin, C8H8O3, occurs in vanilla extract and is used as a flavoring agent, A 37.2 mg
      sample of vanillin is dissolved in 153.1 mg of diphenyl ether, C12H10O. What is the
      molality of vanillin?




   4. Calculate the molality when 75.0 grams of MgCl2 is dissolved in 500.0 g of solvent.




   5. 100.0 grams of sucrose (C12H22O11) is dissolved in 1.50 L of water. What is the
      molality?




CDO CP Chemistry Christman                                              Spring 2012
   6. The lowest limit of taste of MgSO4 in water is 0.040 g in 0.10 L. What is the molarity of
      MgSO4?




   7. How many moles of FeSO4 are in 325 mL of 1.8 x 10-6 M FeSO4?




   8. Determine the number of moles of solute present in 455 mL of 3.75 M HCl solution.




   9. Determine the mass (g) of solute required to form 275 mL of a 0.5151 M KClO4
      solution.




   10. How many grams of NaCN are in 100.0 mL of 3.8 x 10-5 M NaCN?




   11. A 25.0 mL sample of concentrated HCl (12.0 M) is diluted to a final volume of 750.0
       mL. What is the molarity of the final solution?




   12. What volume (mL) is needed to dilute 0.641 M Pb(NO3)2 to have a 50.0 mL of a 0.050
       M solution?



CDO CP Chemistry Christman                                               Spring 2012

				
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