CH 105 1E SI
Test_2_W2
Ionic Compounds
1. What are ionic compounds?
Compounds formed when ions of opposite charge come together (electrostatic
attraction)
2. How do we predict the charge of ions?
By noting the location of the elements in the periodic table
3. Ionic compounds are named as _Cation_ _Anion_.
4. Ionic compounds are usually a mixture of _Metal_ and _Nonmetal_, with the
(metal/nonmetal) being the cation and the (metal/nonmetal) being the anion.
5. What charge do ionic compounds have?
None, they are uncharged
6. For a compound to be uncharged what need to be equal?
Positive and Negative Charges
7. When naming a transition metal as an ion what indicates its charge?
Roman numerals following the name of the ion (in parentheses)
Naming Ionic Compounds
1.
2.
3.
4.
MgCl2 – Magnesium Chloride
CuO – Copper (II) Oxide
AlBr3 – Aluminum Bromide
Na2S – Sodium Sulfide
5. K3N – Potassium Nitride
6. LiI – Lithium Iodide
7. Fe2O3 – Iron (III) Oxide
8. CoCl2 – Cobalt (II) Chloride
Chemical Formulas from Names
1.
2.
3.
4.
Potassium Iodide - KI
Sodium Chloride - NaCl
Aluminum Oxide – Al2O3
Hydrogen Sulfide – H2S
5. Beryllium Fluoride – BeF2
6. Zinc (II) Chloride – ZnCl2
7. Calcium Oxide - CaO
8. Vanadium (V) Oxide – V2O5
Polyatomic Ions
1. What is the only polyatomic cation you need to know?
Ammonium (NH4+)
2. What are the only two polyatomic anions that end in –ide?
Hydroxide (OH-) and Cyanide (CN-)
Naming Compounds containing Polyatomic Ions
1.
2.
3.
4.
5.
MgSO4 – Magnesium Sulfate (Epsom salt) 6. (NH4)2S – Ammonium Sulfide
NaOCl – Sodium Hypochlorite (Bleach) 7. HCN – Hydrogen Cyanide
CoSO4 – Cobalt (II) Sulfate
8. ZnSO4 – Zinc (II) Sulfate
NH4Cl – Ammonium Chloride
9. Mg3(PO4)2 – Magnesium Phosphate
CaCO3 – Calcium Carbonate (limestone) 10. KMnO4 – Potassium Manganate
Determining Chemical formulas for Compounds Containing Polyatomic Ions
CH 105 1E SI
1. Ammonium Carbonate – (NH4)2CO3
2. Iron (III) Oxide – Fe2O3
3. Silver (I) Sulfate – Ag2SO4
4. Aluminum bicarbonate – Al(HCO3)3
5. Potassium Phosphate – K3PO4
Test_2_W2
6.Magnesium Hydrogen Phosphate
MgHPO4
7. Copper (II) Dihydrogen Phosphate –
Cu(H2PO4)2
8. Ammonium Nitride – (NH4)3N
9. Calcium Hydroxide – Ca(OH)2
10. Manganese (IV) Chlorate – Mn(ClO3)4