Polyatomic Ions What they are and how to write their Chemical Formula Naming Ions, Ionic Compounds,...
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Transcript of Polyatomic Ions What they are and how to write their Chemical Formula Naming Ions, Ionic Compounds,...
Polyatomic Ions
What they are and how to write their Chemical Formula
Naming Ions, Ionic Compounds, Transition Metals and Writing their
formulas.
Monatomic Ions
• Mono = one• Thus monatomic ions are single atom ions.
Na+ Cl-
Monatomic Ions
Fe3+ O2-
Cations Anions
Ionic Compounds
Cl-Na+
Sodium Chloride
Polyatomic Ions
• poly = many• Thus polyatomic ions are ions composed of
more than one type of atom.• We can represent polyatomic ions as single
units when writing chemical formulas.
OH- CO32-
Hydroxide Carbonate
NH4+
Ammonium
SO3-2
Sulfite
• Calcium has a +2 charge and phosphate has a -3 charge.
Sodium Hydroxide
OH-
Ca2+ PO43-
Na+ NaOH
• Sodium has a +1 charge and hydroxide a -1 charge so they combine in a 1:1 ratio.
Calcium Phosphate
PO43-
• Calcium has a +2 charge and phosphate has a -3 charge.
Sodium Hydroxide
OH-
Ca2+ PO43-
Na+ NaOH
• Sodium has a +1 charge and hydroxide a -1 charge so they combine in a 1:1 ratio.
Calcium Phosphate
Ca2+
Ca2+
Ca3(PO4)2
Ammonium Chloride
Calcium Hydroxide
Ammonium Chloride
Cl-NH4+ NH4Cl
• Ammonium has +1 charge and chloride has a -1 charge so they combine in a 1:1 ratio.
Calcium Hydroxide
Ammonium Chloride
Cl-NH4+ NH4Cl
• Ammonium has +1 charge and chloride has a -1 charge so they combine in a 1:1 ratio.
Calcium Hydroxide
OH-Ca2+
OH-
Ammonium Chloride
Cl-NH4+ NH4Cl
• Ammonium has +1 charge and chloride has a -1 charge so they combine in a 1:1 ratio.
Calcium Hydroxide
OH-Ca2+
• Calcium +2 charge and Hydroxide has a -1 charge so they combine in a 1:2 ratio.
Ca(OH)2
Assignment[1] Analyze the common polyatomic ions, what is the general difference between ate and ite ions...
[2] Write the Chemical formula for the following ionic compounds:
a) Sodium Acetate (hot ice!)b) Potassium Chlorate (gummy bear)c) Iron (III) Bicarbonated) Magnesium Oxalatee) Calcium Nitrate (fertilizer!)
[3] Name these ionic compounds:
a) Li2CrO4
b) K3PO4
c) AgNO3
d) NaHCO3 (baking soda!)