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Is Ba(OH)_2 classified as an ionic or molecular compound?
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3. Chemical Reactions
Naming Ionic Compounds
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Give the systematic IUPAC name for the compound FeCl3.
A
Ferrous chloride
B
Iron(II) chloride
C
Ferric chloride
D
Iron(III) chloride
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Identify the metal in the compound FeCl3, which is iron (Fe).
Determine the charge on the iron ion by considering the charge of the chloride ions. Each chloride ion (Cl) has a charge of -1, and there are three chloride ions, so the total negative charge is -3.
Since the compound is neutral overall, the iron must have a charge of +3 to balance the -3 from the chlorides.
Use the Roman numeral in parentheses to indicate the oxidation state of the iron ion. Here, iron has a +3 charge, so it is Iron(III).
Combine the metal name with its oxidation state and the name of the anion to form the systematic IUPAC name: Iron(III) chloride.
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