Naming compounds

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  • Strontium bromide. Sr is the symbol for strontium. Br is the symbol for bromine, but t ake the first part of the element name (the root) and add – ide to get the name bromide.
  • Chromium(IV) oxide. Cr is the symbol for chromium. O is the symbol for oxygen, but t ake 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.
  • Iron(II) sulfide. For sulfur, t ake 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).
  • Selenium dioxide. Se is the symbol for selenium. O is the symbol for oxygen, but t ake 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.
  • ClO 3 – is the polyatomic ion chlorate.
  • Only Formula I is named correctly. Formula II is chlorine dioxide. Formula III is lead(IV) iodide. Formula IV is copper(II) sulfate.
  • The 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).
  • Phosphorus trichloride. Carbon monochloride has the formula CCl. Tin(IV) chloride has the formula SnCl 4 . Magnesium chloride has the formula MgCl 2 . Phosphorus trichloride has the formula PCl 3 and is therefore the correct answer.
  • Naming compounds

    1. 1. Chapter 5Nomenclature
    2. 2. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 25.1 Naming Compounds5.2 Naming Binary Compounds That Contain a Metal and a No5.3 Naming Binary Compounds That Contain Only Nonmetals5.4 Naming Binary Compounds: A Review5.5 Naming Compounds That Contain Polyatomic Ions5.6 Naming Acids5.7 Writing Formulas from Names
    3. 3. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 3• Binary Compounds Composed of two elements• Binary Ionic Compounds Metal—nonmetal• Binary Covalent Compounds Nonmetal—nonmetal
    4. 4. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 4• Binary ionic compoundscontain positive cationsand negative anions. Type I compounds• Metal present formsonly one cation. Type II compounds• Metal present canform 2 or morecations withdifferent charges.
    5. 5. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 5Metals (Groups I, II, and III) and Non-MetalsMetal _________ + Non-Metal _________ideSodium ChlorineSodium Chloride NaClType I Compounds
    6. 6. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 6 Common Simple Cations and Anions
    7. 7. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 71. The cation is always named first and the anionsecond.2. A simple cation takes its name from the nameof the element.3. A simple anion is named by taking the first partof the element name (the root) and adding –ide.Rules for Naming Type I Ionic Compounds
    8. 8. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 8• Examples:KCl Potassium chlorideMgBr2 Magnesium bromideCaO Calcium oxideBinary Ionic Compounds (Type I)
    9. 9. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 9ExerciseWhat is the name of the compound SrBr2?a) strontium bromineb) sulfur bromidec) strontium dibromided) strontium bromide
    10. 10. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 10Binary Ionic Compounds (Type II)• Metals in thesecompounds can formmore than one type ofpositive charge.• Charge on the metal ionmust be specified.• Roman numeralindicates the charge ofthe metal cation.• Transition metal cationsusually require a Romannumeral.
    11. 11. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 11Metals (Transition Metals) and Non-MetalsMetal ______ +Roman Numeral (__) + Non-Metal ________ideIron III BromineIron (III) Bromide FeBr3Compare with Iron (II) Bromide FeBr2Metals (Transition Metals) and Non-MetalsOlder SystemMetal (Latin) _______ + ous or ic + Non-Metal ________ideFerrous BromineFerrous Bromide FeBr2Compare with Ferric Bromide FeBr3Type II Compounds
    12. 12. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 12Common Type II Cations
    13. 13. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 131. The cation is always named first and the anionsecond.2. Because the cation can assume more than onecharge, the charge is specified by a Romannumeral in parentheses.Rules for Naming Type II Ionic Compounds
    14. 14. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 14• Examples:CuBr Copper(I) bromideFeS Iron(II) sulfidePbO2 Lead(IV) oxideBinary Ionic Compounds (Type II)
    15. 15. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 15ExerciseWhat is the name of the compound CrO2?a) chromium oxideb) chromium(II) oxidec) chromium(IV) oxided) chromium dioxide
    16. 16. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 16ExerciseWhat is the correct name of the compound thatresults from the most stable ion for sulfur andthe metal ion that contains 24 electrons?a) iron(III) sulfideb) chromium(II) sulfidec) nickel(III) sulfated) iron(II) sulfide
    17. 17. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 17• Formed between two nonmetals.1. The first element in the formula is namedfirst, and the full element name is used.2. The second element is named as thoughit were an anion.3. Prefixes are used to denote the numbersof atoms present.4. The prefix mono- is never used fornaming the first element.Rules for Naming Type III Binary Compounds
    18. 18. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 18Type 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
    19. 19. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 19Prefixes Used to IndicateNumbers in Chemical Names 9 nona-10 deca-11 undeca-12 dodeca-13 trideca-14 tetradeca-15 pentadeca-16 hexadeca-17 heptadeca-18 octadeca-19 nonadeca-20 icosaAdditional Prefixes
    20. 20. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 20• Examples:CO2 Carbon dioxideSF6 Sulfur hexafluorideN2O4 Dinitrogen tetroxideBinary Covalent Compounds (Type III)
    21. 21. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 21ExerciseWhat is the name of the compound SeO2?a) selenium oxideb) selenium dioxidec) selenium(II) oxided) selenium(IV) dioxide
    22. 22. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 22Flow Chart for Naming Binary Compounds
    23. 23. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 23Let’s Practice!Name the following.CaF2K2SCoI2SnF2SnF4OF2CuI2CuISO2SrSLiBrStrontium SulfideLithium BromideCopper (I) Iodide or Cuprous IodideSulfur dioxideCopper (II) Iodide or Cupric IodideOxygen diflourideTin (IV) Fluoride or Stannic FluorideTin (II) Fluoride or Stannous FluorideCobalt (II) Iodide or Cobaltous IodidePotassium SulfideCalcium Flouride
    24. 24. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 24• Polyatomic ions are charged entities composedof several atoms bound together.• They have special names and must bememorized.
    25. 25. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 25Names of Common Polyatomic Ions (page 130)
    26. 26. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 26• Naming ionic compounds containingpolyatomic ions follows rules similar to thosefor binary compounds. Ammonium acetate
    27. 27. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 27NaOH Sodium hydroxideMg(NO3)2 Magnesium nitrate(NH4)2SO4 Ammonium sulfateFePO4 Iron(III) phosphateExamples
    28. 28. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 28Overall Strategy for Naming Chemical Compounds
    29. 29. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 29ExerciseWhat is the name of the compound KClO3?a) potassium chloriteb) potassium chloratec) potassium perchlorated) potassium carbonate
    30. 30. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 30ExerciseExamine the following table of formulas and names.Which of the compounds are named correctly?a) I, IIb) I, III, IVc) I, IVd) I onlyFormula NameI P2O5Diphosphorus pentoxideII ClO2Chlorine oxideIII PbI4Lead iodideIV CuSO4Copper(I) sulfate
    31. 31. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 31• Acids can be recognized by the hydrogenthat appears first in the formula—HCl.• Molecule with one or more H+ions attachedto an anion.Acids
    32. 32. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 32• If the anion does not contain oxygen, theacid is named with the prefix hydro– and thesuffix –ic attached to the root name for theelement.• Examples:HCl Hydrochloric acidHCN Hydrocyanic acidH2S Hydrosulfuric acidRules for Naming Acids
    33. 33. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 33Acids That Do Not Contain Oxygen
    34. 34. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 34• If the anion contains oxygen: The suffix –ic is added to the root name ifthe anion name ends in –ate.• Examples:HNO3 Nitric acidH2SO4Sulfuric acidHC2H3O2 Acetic acidRules for Naming Acids
    35. 35. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 35• If the anion contains oxygen: The suffix –ous is added to the root nameif the anion name ends in –ite.• Examples:HNO2 Nitrous acidH2SO3Sulfurous acidHClO2 Chlorous acidRules for Naming Acids
    36. 36. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 36Some Oxygen-Containing Acids
    37. 37. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 37Flowchart for Naming Acids
    38. 38. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 38ExerciseWhich of the following compounds is namedincorrectly?a) KNO3 potassium nitrateb) TiO2 titanium(II) oxidec) Sn(OH)4tin(IV) hydroxided) PBr5 phosphorus pentabromidee) H2SO3 sulfurous acid
    39. 39. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 39• Sodium hydroxide NaOH• Potassium carbonate K2CO3• Sulfuric acid H2SO4• Dinitrogen pentoxide N2O5• Cobalt(III) nitrate Co(NO3)3Examples
    40. 40. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 40ExerciseA compound has the formula XCl3 where Xcould represent a metal or nonmetal. Whatcould the name of this compound be?a) phosphorus trichlorideb) carbon monochloridec) tin(IV) chlorided) magnesium chloride
    41. 41. Naming CompoundsReturn to TOCCopyright © Cengage Learning. All rights reserved 41Lets Practice Some More!HFNa2CO3H2CO3KMnO4HClO4H2SNaOHCuSO4PbCrO4H2ONH3Hydrooxic acid (no……just water)Nitrogen trihydride (no..just ammonia)Copper (II) sulfate or Cupric sulfateLead (II) chromate or Plubous chromateSodium hydroxideHyrdogen sulfuric acidPerchloric acidPotassium permanganateSodium carbonateHydroflouric acidCarbonic acid

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