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Chapter 6 Notes, part II Naming Ionic Compounds
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For naming an ionic compound, 1) Name the metal. EX: BaBr 2 Barium
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Naming Ionic Compounds For naming an ionic compound, 2) Write the name of the non-metal, and change the end to –ide. Barium brom ine ide EX: BaBr 2
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Naming Ionic Compounds If there is a polyatomic anion, then you do not change the ending: EX: Ca(NO 3 ) 2 Calcium nitrate
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Name these: Na 2 O MgCl 2 Na 2 CO 3
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Name these: Na 2 Osodium oxide MgCl 2Magnesium chloride Na 2 CO 3sodium carbonate
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Naming Ionic Compounds 3)If a positive ion (a metal) can have more than one oxidation number, you have to designate its charge in the name! We do this by putting the charge as a roman numeral in parenthesis between the positive and negative ion.
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Naming Ionic Compounds Why do we need to do that? Name: Fe 2 O 3 FeO These both exist in nature, so we have to show which one we mean.
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Naming Ionic Compounds Fe 2 O 3 Name it: Iron ox ygen ide ( ) III -2 If this is true, then what was iron to begin with? +3 Reverse criss cross to find the charge of the iron:
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Naming Ionic Compounds Fe O Name it: Iron ox ygen ide ( ) II If this is not true, the numbers must have been reduced. +2-2
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Naming Ionic Compounds Metals that don’t need parentheses: Group I, II and IIIA Zn, Cd (always +2) Ag (always +1) Which means transition, inner transition and other metals do need a paranthesis!
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Tin and Lead Tin and Lead do need a roman numeral because they have more than one oxidation number. Sn(II) and Sn(IV) Pb(II) and Pb(IV)
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Naming Ionic Compounds Final flowchart of how to name: Name the positive ion. Does it need a roman numeral? If so, reverse criss cross, if not, ignore. Name the negative ion and: If a nonmetal end in -ide; if it is a polyatomic ion, name the polyatomic.
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Name these: Na 2 S CuCl 2 K 2 SO 4 Pb(NO 3 ) 4
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Name these: Na 2 Ssodium sulfide CuCl 2copper(II)chloride K 2 SO 4potassium sulfate Pb(NO 3 ) 4lead(IV)nitrate
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