Ionic compounds p 176 180 203 211
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Ionic Compounds (p. 176 – 180, 203 – 211). Ionic Compounds. M ost of the rocks and minerals that make up Earth’s crust consist of positive and negative ions held together by ionic bonding. An ionic compound is composed of positive and negative ions that are

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Ionic Compounds (p. 176 – 180, 203 – 211)

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Ionic compounds p 176 180 203 211

Ionic Compounds (p. 176 – 180, 203 – 211)


Ionic compounds

Ionic Compounds

  • Most of the rocks and minerals that make up Earth’s crust consist of positive and negative ions held together by ionic bonding.

  • An ionic compound is composed of positive and negative ions that are

    combined so that the numbers of positive and negative charges are equal.

  • Most ionic compounds exist as crystalline solids


Ionic compounds1

Ionic Compounds

  • The chemical formula of an ionic compound merely represents the simplest ratio of the compound’s combined ions that gives electrical neutrality.

  • A formula unit is the simplest

    collection of atoms from which an ionic compound’s formula can be

    established.


Crystal structure of nacl

Crystal structure of NaCl


Ratio is 6 6 or 1 1

Ratio is 6:6 or 1:1


Crystal structure of caf 2

Crystal structure of CaF2


Dot diagrams

Dot Diagrams

  • show transfer of e-


Dot diagrams1

Dot Diagrams

show transfer of e-


Electron dots for cations

Electron Dots For Cations

Ca


Electron dots for cations1

Electron Dots For Cations

Ca


Electron dots for cations2

Electron Dots For Cations

Ca+2


Electron dots for anions

Electron Dots For Anions

P

P-3


Ionic compounds p 176 180 203 211

Ionic Bonding

Ca+2

Ca+2

P -3

Ca+2

P -3


Ionic compounds p 176 180 203 211

Ionic Bonding

Ca3P2

Calcium phosphide


Ionic nomenclature

Ionic Nomenclature

Common Ion Charges

1+

0

2+

3+

NA

3-

2-

1-

varies


Binary ionic compounds

Binary Ionic compounds

  • Made of two different elements that have formed ions

  • End in -ide


Monatomic ions p 205

Monatomic ions – p. 205

  • Ions formed from a single atom

  • Metals from positive monatomic ions

  • Nonmetals form negative monatomic ions ( nonmetal ions end in –ide, ex. Chlorine becomes the chloride ion)


Variable oxidation s

Variable oxidation #’s

  • Some elements have more than one oxidation number.

  • Groups 3 - 12, tin, lead. The stock system of nomenclature uses roman numerals to indicate the oxidation number.

  • (p.205)


Ionic compounds p 176 180 203 211

Al 3+ O 2-

Al 2 O 3

(6 +) + (6-) = 0

Formula isAl2O3


Write the formulas for these

Write the formulas for these

  • Lithium sulfide

  • tin (II) oxide

  • tin (IV) oxide

  • Magnesium fluoride

  • Silver chloride

  • Iron (III) phosphide

  • Iron (III) sulfide

  • Potassium iodide


Write the formulas for these1

Write the formulas for these

  • Sodium sulfide

  • Aluminum sulfide

  • Aluminum nitride

  • Copper (II) bromide

  • Iron (II) oxide

  • Lead (II) chloride

  • Mercury (II) sulfide


Compounds with polyatomic ions

Compounds with polyatomic ions

  • Review the list on page 210

  • All are negative except the ammonium ion

  • Most are oxyanions (contain oxygen)

  • When more than one polyatomic ion is in a compound, parentheses must be placed around the polyatomic ion.


Compounds with polyatomic ions1

Compounds with polyatomic ions

  • Copper (II) sulfate

  • calcium nitrate

  • barium nitrate

  • Ammonium chloride

  • ammonium sulfide

  • Lithium nitrate

  • Sodium carbonate

  • Potassium perchlorate


Naming binary ionic compounds

Naming Binary Ionic Compounds

  • Write the name of the cation first

  • Write the root of the anion, end in -ide

  • NaCl = sodium chloride

  • MgBr2 = magnesium bromide

  • KI = potassium iodide

  • BaO = barium oxide


Naming binary ionic compounds1

Naming Binary Ionic Compounds

  • The problem comes with the variable transition metals.

  • You must determine the roman numeral.


Ionic compounds p 176 180 203 211

CuO

CoCl3

Cu2S

Fe2O3

SnCl2

CrN

Sc3P2

PbO

PbO2


Ionic compounds with polyatomic ions

Ionic Compounds with polyatomic ions

the ending of the polyatomic ion doesn’t change

NaNO3

CaSO4

CuSO3

(NH4)2O

LiCN

Fe(OH)3


Ionic compounds p 176 180 203 211

(NH4)2CO3

NiPO4

FeCrO4

Pb3(PO4)2

  • See Sample Problems 7-1,7-2,7-3

    (p.207,209,211)

  • h.w. p. 236 # 27, 41,Handout p.2


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