What is trivalent anions?
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An ion carrying a positive charge is called a cation, and one carrying a negative charge is called an anion. ... For example, Na+ is a monovalent cation, Cl- is a monovalent anion, Ca2+ is a divalent cation, SO42- is a divalent anion, Fe3+ is a trivalent cation, and PO43- is a trivalent anion.
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