Solutions & Solubility by 91K4n7

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									Ch 100: Fundamentals for Chemistry                                                   Page: 1
Instructor: Tony Zable                                           Solutions & Moles Worksheet

1) Identify the ions in the following ionic compounds:
   o   NaCl                                          o   MgCl2.(H20)6


   o   CaCl2                                         o   NH4Cl


   o   NaNO3

2) Name the following ionic compounds:
   o   NaCl                                          o   MgCl2.(H20)6


   o   CaCl2                                         o   NH4Cl


   o   NaNO3
3) Determine the molar mass for the following ionic compounds:
   o   NaCl


   o   CaCl2


   o   NaNO3


   o   MgCl2.(H20)6


   o   NH4Cl



4) You have obtained the following mass measurements for the ionic compounds below.
Determine the number of moles of each sample.

   a) 5.03 g of NaCl: __________


   b) 4.98 g of CaCl2: __________


   c) 5.12 g of NaNO3: __________


   d) 5.28 of MgCl2.(H20)6: __________


   e) 4.74 g of NH4Cl: __________
Ch 100: Fundamentals for Chemistry                                              Page: 2
Instructor: Tony Zable                                      Solutions & Moles Worksheet

5) Each of the samples are placed into a separate 5.0 mL volume H2O and completely
dissolved. Determine the mass concentration of each solution in grams/L.
   o   NaCl


   o   CaCl2


   o   NaNO3


   o   MgCl2.(H20)6


   o   NH4Cl


6) Determine the molar concentration of each solution in moles/L (M).
   o   NaCl


   o   CaCl2


   o   NaNO3


   o   MgCl2.(H20)6


   o   NH4Cl


7) Determine the number of moles of each ion in each solution.
   o   NaCl


   o   CaCl2


   o   NaNO3


   o   MgCl2.(H20)6


   o   NH4Cl


Final Question: How much H2O would you need to add to your NaCl solution to get a final
concentration (molarity) of 0.15 mol/L?

								
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