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Chemical Formulas, and Nomenclature ch 9. Oxidation Numbers of Monatomic Ions (On periodic table handout). 0. 1+. 2+. 3+. 4+. 2-. 3-. 1-. most 2+, but varies. Oxidation Numbers and formulas p 66.

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Chemical Formulas,

and

Nomenclature ch 9


Oxidation numbers of monatomic ions on periodic table handout
Oxidation Numbers of Monatomic Ions (On periodic table handout)

0

1+

2+

3+

4+

2-

3-

1-

most 2+,

but varies


Oxidation numbers and formulas p 66
Oxidation Numbers and formulas p 66 handout)

  • Warm up: what does oxidation # tell us about the valence electrons of that atom?

  • Transition elements have more than one oxidation #, determined by a roman numeral.

    EX: iron (II) is Fe+2

    iron (III) is Fe+3


Polyatomic ions p66
Polyatomic Ions p66 handout)

  • are made up of two or more atoms.

  • Polyatomic ions generally have the following endings: “ate” or “ite”


Oxidation numbers formulas p66
Oxidation Numbers & Formulas p66 handout)

  • The sum of the oxidation numbers in a compound must equal zero.

    EX: CaCl2 = Ca+2 + Cl- + Cl-

    2 positive charges –

    2 negative charges = 0


Writing ionic formulas p66
Writing Ionic Formulas p66 handout)

  • the cation ( positive metal ion) is always written before the anion (negative nonmetal ion).

    There is only one polyatomic cation: NH4+


Criss cross method of writing formulas p66
Criss handout) Cross Method of Writing Formulas p66

  • Ex. Write the formula for Aluminum and Oxygen:

    Al +3 and O-2

    Al and O

    Al2O3


Criss cross method of writing formulas p661
Criss handout) Cross Method of Writing Formulas p66

EX:Lead (II) & Phosphate

Pb+2 and PO4 -3

Pb and PO4

Pb3(PO4)2


Nomenclature p68
Nomenclature p68 handout)

  • Warm up: how do you use the criss cross method to write a formula?

  • Let’s take a look!


Naming binary ionic compounds 2 elements p68
Naming Binary Ionic Compounds ( handout)2 elements) p68

1. Name of cation (metal) is given first. The name is the same as the element.

2. Name of anion(nonmetal) is given last. The name is the same as the element, but with an “ide” ending.


Naming ionic compounds p68
Naming Ionic Compounds p68 handout)

EX: Al2O3

Aluminum oxide

cation anion


Naming ternary ionic compounds p68
Naming Ternary Ionic Compounds p68 handout)

  • Compounds containing a polyatomic ion.

    1. Cation rule from binary applies.

    2. Anion takes the name of the polyatomic ion as found on the table.

    EX: Al2(SO4)3

    Aluminum sulfate

    EX: Mg(OH)2

    Magnesium hydroxide


Transition metals in formulas p68
Transition metals in formulas p68 handout)

  • Remember: they can make 2 charges.

  • Use roman numeral in name.

  • Ex: CrCl2

    Chromium(II) chloride

    Ex: CuCO3

    Copper(II) Carbonate


Naming ionic compounds
Naming Ionic Compounds handout)

EX: AgCl is __________________

Silver chloride

HgO is ___________________

Mercury (II) oxide

CaBr2 is ___________________

Calcium bromide

Cu2O is ___________________

Copper (I) oxide


Naming ionic compounds1
Naming Ionic Compounds handout)

EX: SnCO3 is ____________________

Tin(II) carbonate

Co(OH)2 is ___________________

Cobalt (II) hydroxide

Zn(NO3)2 is __________________

Zinc nitrate

KClO3 is ___________________

Potassium chlorate


Naming binary molecular compounds p70
Naming Binary Molecular compounds p70 handout)

  • Warm up: why does Cobalt (II) hydroxide have a roman numeral in its name?

  • Name the following compound:

  • Ba(Na)2

    Banana!


Naming binary molecular compounds p701
Naming Binary Molecular Compounds p70 handout)

  • Composed of two nonmetals

  • Prefixes are used


Naming binary molecular compounds p702
Naming Binary Molecular Compounds p70 handout)

  • Say name of 1st element. If there is more than one, give it a prefix.

  • Say the name of second element and change ending to –ide. Always give it a prefix.

    3. The o or a at the end of a prefix is dropped when the element begins with another vowel.

    EX: monoxide or pentoxide


Naming binary molecular compoundsp70
Naming Binary Molecular Compoundsp70 handout)

EX: P4O3

*tetraphosphorus trioxide

EX: NO

*nitrogen monoxide


Naming binary molecular compounds
Naming Binary Molecular Compounds handout)

EX: SO3 is ____________________

Sulfur trioxide

PBr5 is ____________________

Phosphorus pentabromide

ICl3 is _____________________

Iodine trichloride

H20 is _____________________

Dihydrogen monoxide


Naming binary molecular compounds1
Naming Binary Molecular Compounds handout)

EX: NH3 is ____________________

nitrogen trihydride

N2O3 is ____________________

dinitrogen trioxide

CO is _____________________

carbon monoxide

P2O5 is _____________________

diphosphorouspentaoxide


Naming acids bases p 72
Naming handout)Acids& Bases p 72

  • Warm up: what do you know about acids?

  • Acids are molecular compounds that have a Hydrogen atom bonded to an anion. (H-anion)

  • Anions can be elements, ending: “-ide”

  • H + element:  “hydro” -stem “-ic” acid

  • Ex) HBr=hydrobromic acid


Naming acids p72
Naming acids p72 handout)

  • Anions can be polyatomics,ending: ”-ite, -ate”

  • H + polyatomic (-ate) -stem “-ic” acid

  • Ex) H3PO4= phosphoric acid

  • H + polyatomic (-ite) -stem “-ous” acid

  • Ex) H2SO3= sulfurous acid


Naming acids p 71
Naming acids p 71 handout)

  • HBr __________________________

    hydrobromic acid

  • H2SO4 _____________________________________

    sulfuric acid

  • HNO2 _____________________________________

    nitrous acid

  • H3PO4 _____________________________________

    phosphoric acid

  • H2CO3 ____________________________________

    carbonic acid

  • HCl ____________________________

    hydrochloric acid


Formulas of acids p71
Formulas of acids p71 handout)

  • Nitric acid_______________________

    HNO3

  • Acetic acid_______________________

    HC2H3O2

  • Hydrofluoric acid_________________

    HF

  • Sulfurous acid___________________

    H2SO3

  • Hydrochloric acid_________________

    HCl


Naming bases p72
Naming Bases handout)p72

  • Say the name of the first element, then add “hydroxide” to end.

  • Ex) LiOH- lithium hydroxide

  • Ex) Mg(OH)2- magnesium hydroxide


Polyatomic ions
Polyatomic Ions handout)


Molecular and empirical formulas
Molecular and Empirical Formulas handout)

  • The formulas for compounds that exist as molecules are called molecular formulas.

    EX: Hydrogen peroxide, H2O2, consists of two H atoms and two O atoms.

  • The atomic ratio of hydrogen peroxide is one to one.

  • The simplest formula that would indicate this ratio would be HO. This simple formula is an empirical formula.


Strange names for molecules
Strange Names for Molecules handout)

  • ANOL

  • BUTANOL



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