Chapter 6 Notes Part II

Chapter 6 NotesChapter 6 NotesPPart IIart II

Naming Ionic Naming Ionic CompoundsCompounds

Naming Ionic Naming Ionic CCompoundsompounds

For naming an ionic For naming an ionic compound,compound,

1) Name the metal.1) Name the metal.2) Write the name of the 2) Write the name of the

non-metal, and change the non-metal, and change the end to –ide.end to –ide.

Naming Ionic Naming Ionic CCompoundsompounds

Example: NaBrExample: NaBrSodium bromideSodium bromideExample: CaFExample: CaF22

Calcium fluorideCalcium fluoride

Polyatomic IonsPolyatomic IonsPolyatomic ion – a Polyatomic ion – a charged covalently charged covalently bonded group of bonded group of atomsatoms

Example: Sulfate SOExample: Sulfate SO44--

22

Naming Ionic Naming Ionic CCompoundsompounds

If there is a polyatomic If there is a polyatomic anion, then you anion, then you do notdo not change the ending:change the ending:

Ex) NaEx) Na22SOSO44 – Sodium – Sodium sulfatesulfate

Name these:Name these:

NaNa22OO

MgClMgCl22

NaNa22COCO33

Name these:Name these:

NaNa22O – sodium oxideO – sodium oxide

MgClMgCl22 – magnesium – magnesium chloridechloride

NaNa22COCO33 – sodium – sodium carbonatecarbonate

Naming Ionic Naming Ionic CCompoundsompounds

3) If a positive ion (a metal) 3) If a positive ion (a metal) can have more than one can have more than one oxidation number, you have oxidation number, you have to designate its charge in to designate its charge in the name!the name!

Naming Ionic Naming Ionic CCompoundsompounds

We do this by putting We do this by putting the charge as a roman the charge as a roman numeral in numeral in parenthesis between parenthesis between the positive and the positive and negative ion.negative ion.

Naming Ionic Naming Ionic CCompoundsompounds

Why do we need to do Why do we need to do that?that?

Name: FeName: Fe22OO3 3 andand FeOFeO

These both exist in These both exist in nature, so we havenature, so we haveto to show which one we mean.show which one we mean.

Naming Ionic Naming Ionic CCompoundsompounds

Use the reverse of the Use the reverse of the criss cross to figure criss cross to figure out the charge of the out the charge of the positive ion.positive ion.

FeFe22OO3 3 is Iron III Oxideis Iron III OxideFeO is Iron II OxideFeO is Iron II Oxide

Naming Ionic Naming Ionic CCompoundsompounds

Metals that don’t need Metals that don’t need parentheses:parentheses:

Group I, II and IIIAGroup I, II and IIIA

Zn, Cd (always +2) Zn, Cd (always +2)

Ag (always +1)Ag (always +1)

Naming Ionic Naming Ionic CCompoundsompounds

Which means Which means transition, inner transition, inner transition and other transition and other metals do need metals do need parentheses!parentheses!

Naming Ionic Naming Ionic CCompoundsompounds

1. Name the positive ion.

2. Does it need a roman numeral? If so, reverse criss cross, if not, ignore.

Naming Ionic Naming Ionic CCompoundsompounds

Name the negative ion and:

If a nonmetal end in -ide; if a polyatomic ion, end normally.

Name these:Name these:

NaNa22SS

CuClCuCl22

KK22SOSO44

Pb(NOPb(NO33))33

Name these:Name these:

NaNa22S – sodium sulfideS – sodium sulfide

CuClCuCl22 – copper chloride – copper chloride

KK22SOSO44 – potassium – potassium sulfatesulfate

Pb(NOPb(NO33))33 – lead nitrate – lead nitrate