1. Based on what you have learned about ions, charges, atomic masses, atomic structure, the periodic table, moles, volume, molarity, etc., can you predict the behavior in an electric field of a salt that has two + charges per atom instead of one ?
   
   
   

   CaCl2	Ca++	+	2Cl-

   
   versus
   
   

   NaCl	Na+	+	Cl-

   
   
   
2. Design an experiment to test that prediction:
   
   • Question: What is the effect on electric current of using a salt with atoms that have two positive charges each instead of one?
     
   • Hypothesis (your prediction for how this salt will compare to NaCl).
     
   • Test description
     
   • Materials/Procedure
     
   • Data
     
   • Data Analysis (graphs, calculations, formulas used)
     
   • Conclusion -
     
     • restate hypothesis
       
     • hypothesis right or wrong
       
     • defense of your conclusion using data to support your arguments.
   
   
   
3. Do the experiment (Final day)
   
   
4. Final Report Form
   
   1. Cover Page - Title, authors, Science 3, date
      
   2. Experiment #1 - NaCl
      Experiment #2 - CsCl
      Experiment #3 - NaCl vs KCl
      Experiment #4 - NaCl vs CaCl₂
      

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