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Chemistry 112

Chemistry 112. Naming and Writing Formulas for Ionic Compounds. Naming Binary Ionic Compounds. A binary compound is composed of two elements and can either be ionic or molecular If it is ionic and you know its formula, you can write its name Always begins with a metallic cation

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Chemistry 112

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  1. Chemistry 112 Naming and Writing Formulas for Ionic Compounds

  2. Naming Binary Ionic Compounds • A binary compound is composed of two elements and can either be ionic or molecular • If it is ionic and you know its formula, you can write its name • Always begins with a metallic cation • The name does not change • If there is more than one charge, indicate it with a Roman numeral • Always ends with a nonmetallic anion • The name ends in -ide

  3. Writing Formulas for Binary Ionic Compounds If you know the name, you can write its formula Write the symbol of the cation with the charge Do the same thing for the anion Criss cross the charges Reduce to lowest terms

  4. Example Write the name of the following compounds: CaCl2 Fe2O3 Write the formula of the following compounds: barium sulfide nickel (II) fluoride Q. 10 - 11, page 263; Q. 12 – 13, page 265

  5. Naming Compounds with Polyatomic Ions When a compound’s formula has more than two capital letters Identify the polyatomic ion Name the metallic cation Name the nonmetallic anion – do not change its ending Ex. LiCN = lithium cyanide, NH4OH = ammonium hydroxide

  6. For the remainder of class… Questions 17 – 19, page 266 Guided reading – Section 9.2 Section Review – 9.2 Assignment – due Tuesday, April 26

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