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Ions and Ionic Compounds

Ions and Ionic Compounds - – The total charge of the...

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Ions and Ionic Compounds Ions are atoms or groups of atoms that possess an electric charge. Two basic types of ions: Positive ions or cations one or more electrons less than neutral Na + , Ca 2+ , Al 3+ NH 4 + - polyatomic cation Negative ions or anions one or more electrons more than neutral F - , O 2- , N 3- SO 4 2- , PO 4 3- - polyatomic anions Formulas of ionic compounds are determined by the charges of the ions.
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Unformatted text preview: – The total charge of the cations must equal the total charge of the anions. – The compound must be neutral. • NaCl sodium chloride (Na 1+ & Cl 1-) • KOH potassium hydroxide(K 1+ & OH 1-) • CaSO 4 calcium sulfate (Ca 2+ & SO 4 2-) • Al(OH) 3 aluminum hydroxide (Al 3+ & 3 OH 1-)...
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