Naming compounds
This presentation is the property of its rightful owner.
Sponsored Links
1 / 8

Naming Compounds PowerPoint PPT Presentation


  • 72 Views
  • Uploaded on
  • Presentation posted in: General

Naming Compounds. What's in a name? That which we call a rose By any other name would smell as sweet." - William Shakespeare, Romeo and Juliet (II, ii). Background: valences and formulas. We can determine the formula of a compound by completing Lewis diagrams or via “valence”

Download Presentation

Naming Compounds

An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -

Presentation Transcript


Naming compounds

Naming Compounds

What's in a name? That which we call a roseBy any other name would smell as sweet." - William Shakespeare, Romeo and Juliet (II, ii)


Background valences and formulas

Background: valences and formulas

  • We can determine the formula of a compound by completing Lewis diagrams or via “valence”

  • Valence is “the number of electrons an atom must gain, lose, or share to complete its octet”

  • For representative elements valence starts at 1 (IA), climbs to 4 (IVA) and falls back to 1 (VIIA)

  • By knowing the valence of elements you can determine the formula of compounds

  • E.g. what compound would form from C + S?

    Step 1 - write valences: C4S2

    Step 2 - cross down valences: C2S4

AlBr3

K2S

ZnO

Mg3N2

CCl4

CuO or Cu2O

Step 3 - simplify formula: CS2

a) Al,Br b) K,S c) Zn,O d) Mg,N e) C,Cl f) Cu,O


Ionic compounds metal with 1 valence

Ionic compounds (metal with 1 valence)

Rules for naming

  • Names end in -ide. Example: sodium chloride

  • Metal (+ve ion) comes 1st (not chorine sodide)

  • Use the group valence for nonmetals

  • Do not capitalize unless starting a sentence

    Give formulae & name: Ca + I, O + Mg, Na + S

    = Ca2I1 = CaI2 = calcium iodide

    = Mg2O2 = MgO = magnesium oxide

    = Na1S2 = Na2S = sodium sulfide


Multiple valence iupac naming

Multiple valence: IUPAC naming

  • Name ends in -ide, positive/metal comes first

  • The valence of the metal is indicated in brackets using roman numerals

  • E.g. Cu1 is copper(I), Cu2 is copper(II)

  • Numbers refer to valences not to #s of atoms

  • Try: Cu2+Cl, Zn2 + Cl, Co2+Cl, Hg+S (do both)

    Cu2+Cl = Cu2Cl1 = CuCl2 = copper(II) chloride

    Zn2+Cl = Zn2Cl1 = ZnCl2 = zinc chloride

    Co2+Cl = Co2Cl1 = CoCl2 = cobalt(II) chloride

    Hg+S = Hg1S2 = Hg2S = mercury(I) sulfide

    Hg+S = Hg2S2 = HgS = mercury(II) sulfide


Compounds containing polyatomic ions

  • So far we have given valences to single atoms

  • Li + O

Compounds containing polyatomic ions

Li1O2 Li2O

  • Groups of atoms can also have valences

  • “Polyatomic ions” are groups of atoms that interact as a single unit. For valence see p95.

  • E.g.OH1,(SO4)2. Ba3(PO4)2 =

barium phosphate

  • Naming compounds with polyatomic ions is similar to naming other ionic compounds

  • Youshouldnotethatcompoundswithpolyatomic ions have names ending in -ate or -ite not -ide

  • Note that most are negative, except ammonium

  • Name: Ca(OH)2, CuSO4, NH4NO3, Co2(CO3)3


Compounds containing polyatomic ions1

Compounds containing polyatomic ions

Ca(OH)2

CuSO4

NH4NO3

Co2(CO3)3

- calcium hydroxide

- copper(II) sulfate

- ammonium nitrate

- cobalt(III) carbonate


Naming covalent compounds

Naming covalent compounds

  • prefixrefersto#ofatoms-notvalence

  • N2O4 = dinitrogen tetroxide

  • Exception:dropmonoforfirstelement

  • CO2 = carbon dioxide

  • The first vowel is often dropped to avoid the combination of “ao” or “oo”.

  • CO=carbonmonoxide(monooxide)

  • -ide ending, each element has “prefix”

P4O10= tetraphosphorus decoxide

SO2= sulfur dioxide (doxide)

  • Name: CCl4, P2O3,IF7


Write and name the following covalent compounds iupac

Write and name the following covalent compounds (IUPAC)

carbon tetrachloride

diphosporus trioxide

iodine heptafluoride

CCl4

P2O3

IF7

For more lessons, visit www.chalkbored.com


  • Login