2 -Naming Binary Compounds the contain a Metal and a Nonmetal (Types I and II) -Naming Binary Compounds that contain only Nonmetals (Type III) -Review Naming Binary Compounds -Naming Compounds that contain Polyatomic Ions -Naming Acids -Writing Formulas from Names
3 Binary Ionic Compounds Binary CompoundsComposed of two elementsBinary Ionic CompoundsMetal—nonmetalBinary Covalent CompoundsNonmetal—nonmetal
4 Binary ionic compounds contain positive cations and negative anions. Type I compoundsMetal present forms only one cation.Type II compoundsMetal present can form 2 or more cations with different charges.
5 Rules for Naming Type I Ionic Compounds 1. The cation is always named first and the anion second.2. A simple cation takes its name from the name of the element.A simple anion is named by taking the first part of the element name (the root) and adding –ide.
6 Metals (Groups I, II, and III) and Non-Metals Type I CompoundsMetals (Groups I, II, and III) and Non-MetalsMetal _________ + Non-Metal _________ideSodium Chlorine Sodium Chloride NaCl
9 What is the name of the compound SrBr2? a) strontium bromine ExerciseWhat is the name of the compound SrBr2?a) strontium bromineb) sulfur bromidec) strontium dibromided) strontium bromideStrontium bromide. Sr is the symbol for strontium. Br is the symbol for bromine, but take the first part of the element name (the root) and add –ide to get the name bromide.
11 Binary Ionic Compounds (Type II) Metals in these compounds can form more than one type of positive charge.Charge on the metal ion must be specified.Roman numeral indicates the charge of the metal cation.Transition metal cations usually require a Roman numeral.
12 Type II Compounds Metals (usually Transition Metals) and Non-Metals Metal ______ +Roman Numeral (__) + Non-Metal ________ideIron III Bromine Iron (III) Bromide FeBr3 Compare with: Iron (II) Bromide FeBr2Metals (Transition Metals) and Non-Metals the Older SystemMetal (Latin) _______ + ous or ic + Non-Metal ________ideFerrous Bromine Ferrous Bromide FeBr2 Compare with Ferric Bromide FeBr3
14 Rules for Naming Type II Ionic Compounds 1. The cation is always named first and the anion second.2. Because the cation can assume more than one charge, the charge is specified by a Roman numeral in parentheses.
16 What is the name of the compound CrO2? a) chromium oxide ExerciseWhat is the name of the compound CrO2?a) chromium oxideb) chromium(II) oxidec) chromium(IV) oxided) chromium dioxideChromium(IV) oxide. Cr is the symbol for chromium. O is the symbol for oxygen, but take the first part of the element name (the root) and add –ide to get the name oxide. Since chromium can have more than one charge, a Roman numeral must be used to identify that charge. There are two oxygen ions each with a 2– charge, giving an overall charge of –4. Therefore, the charge on chromium must be +4.
17 b) chromium(II) sulfide c) nickel(III) sulfate d) iron(II) sulfate ExerciseWhat is the correct name of the compound that results from the most stable ion for sulfur and the metal ion that contains 24 electrons?a) iron(III) sulfideb) chromium(II) sulfidec) nickel(III) sulfated) iron(II) sulfateIron(II) sulfide. For sulfur, take the first part of the element name (the root) and add –ide to get the name sulfide. Iron with a +2 charge (as the Roman numeral indicates) contains 24 electrons (26p – 24e = +2 charge).
18 Rules for Naming Type III Binary Compounds Binary Compounds Type IIIRules for Naming Type III Binary CompoundsFormed between two nonmetals.1. The first element in the formula is named first, and the full element name is used.2. The second element is named as though it were an anion.3. Prefixes are used to denote the numbers of atoms present.4. The prefix mono- is never used for naming the first element.
19 Non-Metals and Non-Metals Type III CompoundsNon-Metals and Non-MetalsUse Prefixes such as mono, di, tri, tetra, penta, hexa, hepta, etc.CO2 Carbon dioxide CO Carbon monoxidePCl3 Phosphorus trichloride CCl4 Carbon tetrachlorideN2O5 Dinitrogen pentoxide CS2 Carbon disulfide
20 Prefixes Used to Indicate Numbers in Chemical Names Additional Prefixes9nona-10deca-11undeca-12dodeca-13trideca-14tetradeca-15pentadeca-16hexadeca-17heptadeca-18octadeca-19nonadeca-20icosa
22 What is the name of the compound SeO2? a) selenium oxide ExerciseWhat is the name of the compound SeO2?a) selenium oxideb) selenium dioxidec) selenium(II) oxided) selenium(IV) dioxideSelenium dioxide. Se is the symbol for selenium. O is the symbol for oxygen, but take the first part of the element name (the root) and add –ide to get the name oxide. Since they are both nonmetals, prefixes are used to identify the elements (except mono- is not used for the first element). Two oxygen atoms require the use of the prefix di-, making the name dioxide.
24 Let’s Practice!Name the following.CaF2Calcium FlourideK2SPotassium SulfideCoI2Cobalt (II) Iodide or Cobaltous IodideSnF2Tin (II) Fluoride or Stannous FluorideSnF4Tin (IV) Fluoride or Stannic FluorideOF2Oxygen diflourideCuI2Copper (II) Iodide or Cupric IodideCuICopper (I) Iodide or Cuprous IodideSO2Sulfur dioxideSrSStrontium SulfideLithium BromideLiBr
25 Polyatomic ions are charged entities composed of several atoms bound together. They have special names and must be memorized.
30 What is the name of the compound KClO3? a) potassium chlorite ExerciseWhat is the name of the compound KClO3?a) potassium chloriteb) potassium chloratec) potassium perchlorated) potassium carbonateClO3– is the polyatomic ion chlorate.
31 ExerciseExamine the following table of formulas and names. Which of the compounds are named correctly?a) I, IIb) I, III, IVc) I, IVd) I onlyFormulaNameIP2O5Diphosphorus pentoxideIIClO2Chlorine oxideIIIPbI4Lead iodideIVCuSO4Copper(I) sulfateOnly Formula I is named correctly. Formula II is chlorine dioxide. Formula III is lead(IV) iodide. Formula IV is copper(II) sulfate.
32 These are molecules with one or more H+ ions attached to an anion. AcidsAcids can be recognized by the hydrogen that appears first in the formula—HCl.These are molecules with one or more H+ ions attached to an anion.
33 Rules for Naming AcidsIf the anion does not contain oxygen, the acid is named with the prefix hydro– and the suffix –ic attached to the root name for the element.Examples:HCl Hydrochloric acidHCN Hydrocyanic acidH2S Hydrosulfuric acid
35 If the anion contains oxygen: Rules for Naming AcidsIf the anion contains oxygen:The suffix –ic is added to the root name if the anion name ends in –ate.Examples:HNO3 Nitric acidH2SO4 Sulfuric acidHC2H3O2 Acetic acid
36 If the anion contains oxygen: Rules for Naming AcidsIf the anion contains oxygen:The suffix –ous is added to the root name if the anion name ends in –ite.Examples:HNO2 Nitrous acidH2SO3 Sulfurous acidHClO2 Chlorous acid
39 Which of the following compounds is named incorrectly? ExerciseWhich of the following compounds is named incorrectly?KNO3 potassium nitrateTiO2 titanium(II) oxideSn(OH)4 tin(IV) hydroxidePBr5 phosphorus pentabromideH2SO3 sulfurous acidThe correct answer is “b”. The charge on oxygen is 2–. Since there are two oxygen atoms, the overall charge is 4–. Therefore, the charge on titanium must be 4+ (not 2+ as the Roman numeral indicates).
41 a) phosphorus trichloride b) carbon monochloride c) tin(IV) chloride ExerciseA compound has the formula XCl3 where X could represent a metal or nonmetal. What could the name of this compound be?a) phosphorus trichlorideb) carbon monochloridec) tin(IV) chlorided) magnesium chloridePhosphorus trichloride. Carbon monochloride has the formula CCl. Tin(IV) chloride has the formula SnCl4. Magnesium chloride has the formula MgCl2. Phosphorus trichloride has the formula PCl3 and is therefore the correct answer.
42 Lets Practice Some More! HFHydroflouric acidNa2CO3Sodium carbonateH2CO3Carbonic acidKMnO4Potassium permanganateHClO4Perchloric acidH2SHyrdogen sulfuric acidNaOHSodium hydroxideCuSO4Copper (II) sulfate or Cupric sulfatePbCrO4Lead (II) chromate or Plubous chromateH2OHydrooxic acid (haha, no……just water)NH3Ammonia