Lesson 3 - Nomenclature and Properties of Molecular and Ionic Compounds, Acids & Bases, and Water.pp

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Binaryionic compounds.NomenclaturePart I
Quick Review of TermsAtom=the smallest unit of an element that maintains theproperties of that element-neutral(#p+= # e-)Ion=an atom or group of atoms thatcarry a +/- charge=cationsoranions- can besingleorpolyatomicCompound=a pure substance made up from the atoms of twoormore different elements that are chemically bonded- can beionicormolecular
Quick Review of TermsMolecular Compounds=type of compound consisting of two or morenon-metalsin acovalent bond(i.e., do NOT containions)- “sharing” of electrons(in order to look like nearest noblegas…)Ionic Compounds=type of compoundconsisting of ionsformedfrom ametaland anon-metalin anionic bond-transferof electrons(in order to look like nearest noble gas…)
BinaryIonic Compounds -Naming= composed ofonemetallicelement andonenon-metallicelementSteps for naming:0) Identifycompound asionic.1)Write thecation first, and then theanion.- (oftenthis means the metal, then the non-metal)2)Changesuffixof theanionto“-ide.”
BinaryIonic Compounds -NamingTry naming compounds that contain:calcium and sulfurnitrogen and potassiumaluminium and phosphorussodium and chlorinepotassium and fluorineoxygen and zinc=calcium sulfide=potassium nitride=aluminium phosphide=sodium chloride(salt)=potassium fluoride=zinc oxide
BinaryIonic Compounds -FormulaeIonic chemical namesdo not tell us how manyelementsare in each ionic compound. Therefore,deduce!To deduce, we must consider the charges of each ionso that we can determinehow manycations andanions of each element are needed to create acompoundwith anoverall charge of zero.Considermagnesium chloride[MgCl]+
Mg[]2+[][]1 magnesium for every 2chloridesFormula = MgCl2(s)BinaryIonic Compounds -Formulae
0) Identifycompound asionic.Steps for deriving formulae:1)Determine thecharge of each ion.2)Balance the ion chargesuntil thecompoundisneutral.3)Note theratioof cation to anion, and place the ratiointo the formula as asubscript.(Ifeveryoneseems to trulyunderstandthis process,then I’ll consider demonstrating a method that simplifiesall this)BinaryIonic Compounds -Formulae
Derive formulae for compounds thatcontain:magnesium and oxygenbromine and potassiumaluminium and chlorinesodium and nitrogennitrogen and magnesiumcopper and oxygen=MgO(s)=KBr(s)=AlCl3(s)=Na3N(s)=Mg3N2(s)=two possible answersBinaryIonic Compounds -Formulae
Ionic Compounds -StockSystemNecessary for compounds that containmultivalent elements(= elements that can formmore than one kind of ion).Typically these aretransition metalsEg. Cu2+& Cu+Namingthese compounds requires usingRomannumeralsto indicate the charge on the multivalention. (=Stock system).

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Term
Fall
Professor
NoProfessor
Tags
Chemistry, Molecule, Ion, Polyatomic Ionic Compounds

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