Appendix 2

• ammonium 


  NH4+
• dihydrogenphosphate 


  H2PO4-
• ethanoate 


  CH3COO-
• hydrogencarbonate 


  HCO3-
• hydrogensulfate 


  HSO4-
• Nitrite 


  NO2-
• permanganate 


  MNO4-
• chromate


  CrO4 2-
• dichromate 


  Cr2O7 2-
• hydrogenphosphate 


  HPO4 2-
• oxalate


  C2O4 2-
• sulfite 


  SO3 2-
• ammonia 


  NH3
• hydrogen peroxide 


  H2O2
• ethanoic acid 


  CH3COOH
• sulfurous acid 


  H2SO3