ipc notes ionic compound names & formulas. remember… ions - atoms that have a positive or...
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IPC Notes IPC Notes
Ionic Compound Ionic Compound Names & FormulasNames & Formulas
Remember…Remember…
ionsions - atoms that have a - atoms that have a positive or negative chargepositive or negative charge
Oxidation numberOxidation number – the – the charge that an ion has from charge that an ion has from the gain or los of electronsthe gain or los of electrons
Remember…Remember…
Metals tend to form Metals tend to form ions by losing ions by losing electrons, giving them electrons, giving them an overall positive an overall positive charge. charge.
Remember…Remember…
Nonmetals tend to form Nonmetals tend to form ions by gaining ions by gaining electrons, giving them electrons, giving them an overall negative an overall negative charge. charge.
Ionic Ionic CompoCompouundsnds
An ionic compound is An ionic compound is made from a metal made from a metal (positive ion) and a (positive ion) and a nonmetal (negative nonmetal (negative ion).ion).
Ionic Ionic CompoCompouundsnds
Though made from positively Though made from positively and negatively charged ions, and negatively charged ions, an ionic compound is an ionic compound is electrically neutral.electrically neutral.
The total charge of all the ions The total charge of all the ions in a compound is ZERO!!!in a compound is ZERO!!!
Chemical Chemical FoForrmulasmulas
A chemical formula A chemical formula tells you the type and tells you the type and number of atoms in the number of atoms in the representative unit of a representative unit of a compound.compound.
Writing ChemicWriting Chemicaal l FormulasFormulas
11) Write the symbol for ) Write the symbol for the first element given the first element given with its oxidation with its oxidation number.number.
+2
Writing ChemicWriting Chemicaal l FormulasFormulas
22) Write the symbol for ) Write the symbol for the second element the second element given with its given with its oxidation number.oxidation number.
+2
Writing ChemicWriting Chemicaal l FormulasFormulas
3) Criss cross the numbers 3) Criss cross the numbers and write them as and write them as subscripts without the subscripts without the positive or negative signs.positive or negative signs.
ONLY THE NUMBERS ONLY THE NUMBERS CROSS…NOT THE + or -!CROSS…NOT THE + or -!
Writing ChemicWriting Chemicaal l FormulasFormulas
4) If there is a charge 4) If there is a charge of one, do not write it. of one, do not write it. The one is implied. The one is implied.
(just like in Algebra, (just like in Algebra, you don’t write 1x)you don’t write 1x)
Writing ChemicWriting Chemicaal l FormulasFormulas
5) If you have 5) If you have subscripts that are the subscripts that are the same number with same number with opposite signs (like +2 opposite signs (like +2 & -2) they cancel out.& -2) they cancel out.
ExamplesExamples
Barium & ChlorineBarium & Chlorine
ExamplesExamples
Aluminum & SulfurAluminum & Sulfur
ExamplesExamples
Calcium & OxygenCalcium & Oxygen
ExamplesExamples
Sodium & PhosphorusSodium & Phosphorus
ExamplesExamples
Magnesium & NitrogenMagnesium & Nitrogen
ExamplesExamples
Aluminum & FluorineAluminum & Fluorine
Naming Ionic Naming Ionic CCompoundsompounds
For naming an ionic For naming an ionic compound,compound,
1) Name the first element.1) Name the first element.2) Name the second element, 2) Name the second element,
but change the ending to but change the ending to – –ide.ide.
Naming Ionic Naming Ionic CCompoundsompounds
Example: NaExample: Na22OOSodium oxideSodium oxide
Example: MgClExample: MgCl22
Magnesium Magnesium chloridechlorideExample CaSExample CaS
Calcium sulfideCalcium sulfide
Name these:Name these:
Name these:Name these:
NaNa22S S
Name these:Name these:
NaNa22S S sodium sodium sulfidesulfide
Name these:Name these:
NaNa22S S sodium sodium sulfidesulfide
KCl KCl
Name these:Name these:
NaNa22S S sodium sodium sulfidesulfide
KCl KCl potassium potassium chloridechloride
Name these:Name these:
NaNa22S S sodium sodium sulfidesulfide
KCl KCl potassium potassium chloridechloride
LiLi22O O
Name these:Name these:
NaNa22S S sodium sulfidesodium sulfideKCl KCl potassium potassium chloridechloride
LiLi22O lithium oxideO lithium oxide
Name these:Name these:
NaNa22S S sodium sulfidesodium sulfideKCl KCl potassium potassium chloridechloride
LiLi22O lithium oxideO lithium oxide
AlClAlCl33
Name these:Name these:
NaNa22S S sodium sulfidesodium sulfideKCl KCl potassium chloridepotassium chloride
LiLi22O lithium oxideO lithium oxide
AlClAlCl33 aluminum chloridealuminum chloride