Formulas of Ionic Compounds. An ionic compound is a compounds composed of ions. They tend to be combinations of metals and nonmetals. CuSO 4.

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Presentation transcript:

Formulas of Ionic Compounds

An ionic compound is a compounds composed of ions. They tend to be combinations of metals and nonmetals. CuSO 4

Formulas of Ionic Compounds: Formulas for ionic compounds can be written by the following steps:

Formulas of Ionic Compounds: Formulas for ionic compounds can be written by the following steps: (1) Write the formula for the cation and anion (Don’t forget to include the charge of each ion).

Formulas of Ionic Compounds: Formulas for ionic compounds can be written by the following steps: (1) Write the formula for the cation and anion (Don’t forget to include the charge of each ion). (2) Decide how many cations and anions are needed so that the sum of their charges balances out to be zero.

Formulas of Ionic Compounds: Formulas for ionic compounds can be written by the following steps: (1) Write the formula for the cation and anion (Don’t forget to include the charge of each ion). (2) Decide how many cations and anions are needed so that the sum of their charges balances out to be zero. (3) Write the formula of the compound by writing the number of cations followed by the number of anions which you used in step #2. Remember not to include the charges of the ions since now they balance out to be neutral. (*Note when using more than one polyatomic ion the polyatomic ion must be written in parentheses).

Write the formula for barium chloride

Ba 2+ Cl -

Write the formula for barium chloride Ba 2+ Cl - BaCl 2

Write the formula for iron (II) oxide

Fe 2+ O 2-

Write the formula for iron (II) oxide Fe 2+ O 2- FeO

Write the formula for calcium phosphate

Ca 2+ PO 4 3-

Write the formula for calcium phosphate Ca 2+ PO 4 3- Ca 3 (PO 4 ) 2

Write the formula for ammonium carbonate

NH 4+ CO 3 2-

Write the formula for ammonium carbonate NH 4 + CO 3 2- (NH 4 ) 2 CO 3

Write the formulas for the following compounds (a)cobalt (II) chloride (b)lithium sulfate (c)ammonium dichromate (d) aluminum oxide (e) boron (III) phosphide (f) Chromium (V) nitrate

Write the formulas for the following compounds (a)cobalt (II) chloride (b)lithium sulfate (c)ammonium dichromate (d) aluminum oxide (e) boron (III) phosphide (f) Chromium (V) nitrate

HOMEWORK Worksheet: Formulas of Ionic Compounds