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Chapter 8: Ionic Bonding

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Krystle Grant

on 13 November 2012

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Transcript of Chapter 8: Ionic Bonding

We are going to create a foldable for this...

Warning- Even though Chapter 8 only covers Ionic Bonds, we will be covering the other types after this unit!

Setting up the foldable
1. Get two pieces of paper
2. Slightly overlap the two pieces of paper
3. Fold down to create four flaps
4. Check to see if it looks like mine! Day 1 Day 3 Goal Start Ionic Bonding Attraction between Positive (+) and Negative (-)
ions

Electrons go from the metals to the nonmetals

Naming Ionic Compounds
And Writing Ionic Formulas Types of Bonding Ionic Compounds Why do atoms Bond? 1. To have a full valence shell... to be like a Noble Gas
2. So we can get chemically combined compounds Covalent
(two nonmetals) Cut here Cut here Examples of names and formulas Formula Rules Naming Rules Acids
(Hydrogen and nonmetal and (aq) written) Ionic
(has a Metal) Rules for Compound Names and Formulas
Labeling the Foldable Formation of a Positive Ion CATIONS ANIONS Forms when an atom loses one or more valence electrons
Na --> Na (+1) + 1 e-
(Electrons change, not protons) Forms when an atom gains one or more electrons Cl + 1e- = Cl (-1)
# of electrons change, not protons Answers: NaHCO3 = sodium hydrogen carbonate or sodium bicarbonate
K2SO3 = potassium sulfite
MgSO4 = magnesium sulfate
KCN = potassium cyanide
H2PO4 = hydrogen phosphate
Ca(OH)2 = calcium hydroxide
NH4NO3 = ammonium nitrate
Zn(NO3)2 = zinc nitrate
Li3PO4 = lithium phosphate
HNO3 = hydrogen nitrate Nomenclature of ternary ionic compounds Some polyatomic anions that you must know:
NO3- = nitrate NO2- = nitrite
SO4 2 - = sulfate SO32- = sulfite
PO43- = phosphate PO33- = phosphite
CO32- = carbonate
HCO31- = hydrogen carbonate or bicarbonate
OH- = hydroxide CN- = cyanide
C2H3O2- = acetate C2O42- = oxalate Nomenclature of binary ionic compounds Answers: CuHCO3 = copper(I) hydrogen carbonate or cuprous bicarbonate
FeSO3 = iron(II) sulfite or ferrous sulfite
CuSO4 = copper(II) sulfate or cupric sulfate
Cr(CN)3 = chromium(III) cyanide
Cr(PO4)2 = chromium (VI) phosphate
Sn(OH)2 = tin(II) hydroxide or stannous hydroxide
W(NO2)5 = tungsten(V) nitrite
Ti(CO3)2 = titanium(IV) carbonate
CoPO4 = cobalt(III) phosphate or cobaltic phosphate
PbCl2 = lead(II) chloride or plumbous chloride Nomenclature of binary ionic compounds Answers: Na2O = sodium oxide K2S = potassium sulfide

MgBr2 = magnesium bromide AlN = aluminum nitride

Ba3As2 = barium arsenide CaCl2 = calcium chloride

AgCl = silver chloride AlH3 = aluminum hydride
ZnI2 = zinc iodide Li3P = lithium phosphide Nomenclature of binary ionic compounds Name the following ionic compounds: Note: the polyatomic anions will be on your reference materials NaOH sodium hydroxide Ba(NO3)2 barium nitrate
H2SO4 hydrogen sulfate CsNO2 cesium nitrite

Sometimes there is a common name:
KHCO3 potassium hydrogen carbonate or potassium bicarbonate Naming salts composed of the polyatomic ions is the same as with the monatomic anions. Metal name then polyatomic name. NaHCO3 K2SO3 MgSO4 KCN H2PO4

Ca(OH)2 NH4NO3 Zn(NO3)2 Li3PO4 HNO3 Nomenclature of ternary ionic compounds Name the following ionic compounds: When naming type 2 cations, the systematic method (IUPAC) requires the use of roman numerals after the elemental name to represent the oxidation state of the cation. The common name uses the –ic ending for the higher oxidation state and –ous ending for the lower oxidation state. Many times the old latin or greek name is used as the root. CuOH copper(I) hydroxide Fe(NO3)3 iron(III) nitrate
CuSO4 copper(II) sulfate Sn(NO2)4 tin(IV) nitrite
Sometimes a common name exists:
CuOH cuprous hydroxide Fe(NO3)3 ferric nitrate The previous examples only named type 1 or “fixed oxidation state” cations. When naming type 2 or “variable oxidation state” cations the rules change. CuHCO3 FeSO3 CuSO4 Cr(CN)3 Cr(PO4)2
Sn(OH)2 W(NO2)5 Ti(CO3)2 CoPO4 PbCl2 Nomenclature of binary ionic compounds
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