Important ions

• Potassium = K^+
• Hydroxide = OH^-
• Ammonium = NH_4^+
• Hydrogen = H^+
• Hydrogencarbonate = HCO_3^-
• Sodium = Na^+
• Phosphate = PO_4^3-
• Nitrite = NO_2^-
• Chloride = Cl^-
• Nitrate = NO_3^-
• Calcium = Ca^2+