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2. Sulfate SO4

  • 2-
  • 2+
  • 3+
  • 1-

3. nitrate NO3

  • 2+
  • 1-
  • 4+
  • 3-

4. hydrogencarbonate HCO3

  • 2+
  • 1-
  • 5+
  • 2-

5. ammonium NH4

  • 3-
  • 1+
  • 2+
  • 1-
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