Predicting Ionic Charges
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Predicting Ionic Charges. Group IA :. Lose 1 electron to form 1+ ions. H +. Li +. Na +. K +. Predicting Ionic Charges. Group IIA :. Loses 2 electrons to form 2+ ions. Be 2+. Mg 2+. Ca 2+. Ba 2+. Sr 2+. Predicting Ionic Charges. Group 13 :.

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Predicting Ionic Charges

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Predicting ionic charges

Predicting Ionic Charges

Group IA:

Lose 1 electron to form1+ions

H+

Li+

Na+

K+


Predicting ionic charges

Predicting Ionic Charges

Group IIA:

Loses 2 electrons to form2+ions

Be2+

Mg2+

Ca2+

Ba2+

Sr2+


Predicting ionic charges

Predicting Ionic Charges

Group 13:

Group IIIA-Loses 3 electrons to form 3+ions

B3+

Al3+

Ga3+


Predicting ionic charges

Predicting Ionic Charges

Group IVA: loses 4 electrons or gains

4 electrons


Predicting ionic charges

Predicting Ionic Charges

Group VA: Gains 3

electrons to form

3-ions

Nitride

N3-

P3-

Phosphide

As3-

Arsenide


Predicting ionic charges

Predicting Ionic Charges

Oxide

O2-

Group VIA: Gains 2

electrons to form

2-ions

Group 16:

S2-

Sulfide

Se2-

Selenide


Predicting ionic charges

Predicting Ionic Charges

F1-

Fluoride

Br1-

Bromide

Group VIIA: Gains 1

electron to form

1-ions

Cl1-

Chloride

I1-

Iodide


Predicting ionic charges

Predicting Ionic Charges

Group VIII: StableNoble gasesdo notform ions!


Predicting ionic charges

Predicting Ionic Charges

Groups 3 – 12: Manytransitionelements

have more than one possible oxidation state.

Groups 3 - 12:

Iron(II) = Fe2+

Iron(III) = Fe3+


Predicting ionic charges

Predicting Ionic Charges

Groups 3 – 12:Sometransitionelements

have only one possible oxidation state.

Zinc = Zn2+

Silver = Ag+


Writing ionic compound formulas

Writing Ionic Compound Formulas

Example:Barium nitrate

1. Write the formulas for the cation and anion, including CHARGES!

()

2. Check to see if charges are balanced.

Ba2+

NO3-

2

Not balanced!

3. Balance charges , if necessary, usingsubscripts. Use parenthesesif youneed more than oneof apolyatomic ion.


Writing ionic compound formulas1

Writing Ionic Compound Formulas

Example:Ammonium sulfate

1. Write the formulas for the cation and anion, including CHARGES!

( )

NH4+

SO42-

2. Check to see if charges are balanced.

2

3. Balance charges , if necessary, using subscripts. Use parentheses if you need more than one of a polyatomic ion.

Not balanced!


Writing ionic compound formulas2

Writing Ionic Compound Formulas

Example:Iron(III) chloride

1. Write the formulas for the cation and anion, including CHARGES!

Fe3+

Cl-

2. Check to see if charges are balanced.

3

3. Balance charges , if necessary,usingsubscripts. Use parenthesesif youneed more than oneof apolyatomic ion.

Not balanced!


Writing ionic compound formulas3

Writing Ionic Compound Formulas

Example:Aluminum sulfide

1. Write the formulas for the cation and anion, including CHARGES!

2. Check to see if charges are balanced.

Al3+

S2-

2

3

3. Balance charges , if necessary,usingsubscripts. Use parenthesesif youneed more than one of a polyatomic ion.

Not balanced!


Writing ionic compound formulas4

Writing Ionic Compound Formulas

Example:Magnesium carbonate

1. Write the formulas for the cation and anion, including CHARGES!

Mg2+

CO32-

2. Check to see if charges are balanced.

They are balanced!


Writing ionic compound formulas5

Writing Ionic Compound Formulas

Example:Zinc hydroxide

1. Write the formulas for the cation and anion, including CHARGES!

( )

2. Check to see if charges are balanced.

Zn2+

OH-

2

3. Balance charges , if necessary, using subscripts. Use parentheses if you need more than one of a polyatomic ion.

Not balanced!


Writing ionic compound formulas6

Writing Ionic Compound Formulas

Example:Aluminum phosphate

1. Write the formulas for the cation and anion, including CHARGES!

2. Check to see if charges are balanced.

Al3+

PO43-

They ARE balanced!


Naming ionic compounds

Naming Ionic Compounds

  • 1. Cation first, then anion

  • 2. Monatomic cation = name of the element

  • Ca2+ = calciumion

  • 3. Monatomic anion =root+-ide

  • Cl- = chloride

  • CaCl2= calcium chloride


Naming ionic compounds continued

Naming Ionic Compounds(continued)

Metals with multiple oxidation states

  • some metal forms more than onecation

  • useRoman numeralin name

    PbCl2

  • Pb2+is the lead(II) cation

  • PbCl2 = lead(II) chloride


Naming binary compounds

Naming Binary Compounds

  • Compounds between twononmetals

  • First element in the formula isnamed first.

  • Second element is named as if it were ananion.

  • Use prefixes

  • Only usemonoon second element -

P2O5 =

diphosphoruspentoxide

CO2 =

carbondioxide

CO =

carbonmonoxide

N2O =

dinitrogenmonoxide


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