CHEM 110 
                              FALL 1992 
                         Twelfth Take Home Quiz 
                                                                            
  1. Which transition element ion exists in complexes in blood 
     which transport oxygen molecules ?  
                                                                            
  2. In each blank of the following table, write the formula of the 
     compound containing the metallic ion in the left column and 
     the nonmetallic ion in the top row.  
                                                                            
               Cl-     F-       Br-     I-     O2-  
       ........................................................  
       Na+
       ........................................................  
       K+
       ........................................................  
       Mg2+
       ........................................................  
       Ca2+
       ........................................................  
       Al3+
       ........................................................  
                                                                            
  3. Write the formulae of the following di-, tri- or polyatomic 
     ions. Be sure to indicate the proper charges.  
                                                                            
     ammonium         sulfate           carbonate 
                                                                            
     phosphate        hydroxide         nitrate 
                                                                            
                                                                            
  4. Write the formulae of the following compounds.  
                                                                            
      potassium carbonate                    calcium nitrate 
                                                                            
      aluminum phosphate                     magnesium hydroxide 
                                                                            
      sodium sulfate ammonium chloride 
                                                                            
                                                                            
  5. Predict the products and write balanced equations for the 
     following reactions.  
                                                                            
      Na + Cl2 ---> 
                                                                            
      Ca + O2  ---> 
                                                                            
      Al + F2  ---> 
                                                                            
  6. Write the Lewis structures for the following molecules.  
                                                                            
                                                                            
      HF       H2O        NH3         CH4