Chapter_5 Sep_19 Lecture_13.pptx

# Manganeseii chloride manganeseiii chloride

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manganese(II) chloride, manganese(III) chloride, manganese(IV) chloride

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Some Common Ions Metals that have only one charge.
If cation has more than one possible charge: EITHER = Roman numeral in parentheses with no space between name and “(“ OR ous ” ending for lower common charge, “ ic ” ending for higher common charge Then name the anion FeCl 2 iron(II) chloride ferrous chloride FeCl 3 iron(III) chloride ferric chloride Alternative way to name ionic compounds

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Common monatomic ions
Formulas of Ionic Compounds 22 Ionic compounds are electronically neutral . In order for ionic compounds to be electronically neutral, the sum of the charges on the cation and anion in each formula must be zero. Aluminum oxide: Sum of charges: 2(+3) + 3(–2) = 0

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KBr potassium bromide FeCl 2 iron(II) chloride ferrous chloride FeCl 3 iron(III) chloride ferric chloride
Problem Name the following ionic compounds: (a) CaO, (b) Mg 3 N 2 , and (c) Fe 2 S 3 . Strategy Begin by identifying the cation and anion in each compound, and then combine the names for each, eliminating the word ion . Solution (a) CaO is calcium oxide. (b) Mg 3 N 2 is magnesium nitride. (c) Fe 2 S 3 is iron(III) sulfide. Important Be careful not to confuse the subscript in the formula with the charge in the metal ion
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• Ion, Formulas of Ionic Compounds

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