Anions (-vley charged)

• What is the purpose of NO3- ions?

  Mineral ion absorbed by plants to provide a source of nitrogen to make amino acids
• What is the purpose of hydrogen carbonate (HCO3-) ions?

  Maintains pH of the blood
• What is the purpose of a Cl- ion?

  Provides a negative charge to balance to positive sodium and potassium ions in cells.
• What is the purpose of phosphate (PO4 3-) ions?

  Involved in the formation of phospholipids for cell membranes, nucleic acids, ATP formation and making bones