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nomenclature assignment

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emily lackey

on 5 April 2013

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Transcript of nomenclature assignment

Naming compounds Nomenclature Binary Ionic Compounds Naming system used for compounds composed of a metal and a nonmetal. Compounds with polyatomic ions System used for compounds composed of more than two elements. The metal keeps its name, name the same way as you would a bionary ionic compound, still using the stock method for metals with multiple valences Molecular Compounds For nonmetals with nonmetals Metal Nonmetal positive cation metal keeps its name metal elements with multiple valances

negative anions change nonmetal ending to "ide" Stock method Old Method Transition metals Determine the valence charge on the metal using the criss cross method. There are two ways to do this, the stock method being more common 1. name the metal
2. indicate the charge in roman numerals in brackets
3. the second element gets the "ide" suffix 1. use the latin root of the metal
2. for the higher charge option use the ending "ic" and for the lower charge use the ending "ous" Criss Cross Method Write symbols in order (metal, nonmetal) write valence number/charge above the symbols Cross so that the charge on one element becomes the subscript on the other Reduce, divide by greatest common factor Omit subscripts of one Name the oxy-acid radical. Polyatomic anions often add a hydrogen atom, which then adds "hydrogen" or "bi" to the anions name Oxyanions 2 less oxygen's One more oxygen One less oxygen
polyatomic compounds with oxygen The most common oxyanion ends with "ate" Contain 3 oxygen's.

Ex) NO = nitrate Compound starts with "hypo and ends with "ite" Ex) CLO = Hypochlorite - Than the most common ends with "ite" Ex) NO = nitrite - CLO = chlorite - than the most common starts with 'per' and ends with 'ate' Ex) CLO = perchlorate - - use the prefix method, add the prefix of the subscript to the beginning of the element name. 1: mono
2: di
3: tri
4: tetra
5: penta
6: hexa 7: hepta
8: octa
9: nona
10: deca ex) co= carbon monoxide ex) c3cl4= tricarbon tetrachlodide Naming Acids Binary acids Oxyacids Bases Hydrates Derived from the name of the compound (aq) state symbol
- acids show their proprieties in water hydo______ic acid Stem= the most electronegative element in the compound ex) HCl (aq)= hydrochloric acid HF (aq)= Hydroflouric acid Related to the oxyANIONS previously discovered 4 oxygen's: per_____ic acid
3 oxygen's: _____ic acid
2 oxygen's: _____ous acid
1 oxygen: hypo_____ous acid OH ions (hydroxide)
- Ex) NaOH (aq)= sodium hydroxide Ionic compounds that form crystals which contain molecules of water in their structure When heat is applied, it decomposes into water vapor and associated ionic compound. Ex) hydrated copper (II) sulfate
CuSO4 * 5H20
= copper (II) sulfate pentahydrate For every molecule of CuSO4 there are 5 water molecules, therefore you use the prefix "penta" before hydrate after the compound name.
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