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                1. Schritt:  
               
                 Phosphorsäure        und 
                           Wasser 
               Hydroniumion 
                  und     Dihydrogenphosphation 
               
                    H3PO4                   + 
                               H20 
                        H30+ 
                          + 
                            H2PO4- 
               
                       Säure 
              1                                                  Base 
              2                                   
              Säure 2                                         Base 
              1   
               
                 2. Schritt: 
               
                 Dihydrogenphosphation   und       Wasser 
               Hydroniumion 
                  und     Hydrogenphosphation 
                        H2PO4-                      + 
                         H20 
                        H30+ 
                           + 
                      HPO42- 
               
                         Säure 
              1                                                  Base 
              2                                   
              Säure 2                                  Base 
              1   
             
               3. Schritt: 
               
                 Hydrogenphosphation       und 
                    Wasser  Hydroniumion 
                  und     Hydrogenphosphation 
                      HPO42- 
                                      + 
                         H20 
                        H30+ 
                           + 
                      PO43- 
               
                         Säure 
              1                                                  Base 
              2                                   
              Säure 2                                  Base 
              1   
             
             
                Gesamtgleichung: 
                 Phosphorsäure      und 
                   Wasser              
                
              Hydroniumionen     und     Phosphation 
               
                    H3PO4 
                          + 
                       3  H20  
                              
                     3 H30+ 
                          + 
                      PO43- 
             
                     Säure 
              1                                     Base 
              2                                                        
              Säure 2                                  Base 
              1   
             
            
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