View
221
Download
0
Category
Tags:
Preview:
Citation preview
Chapter 4.2Naming Compounds
Naming Ionic Compounds
Before you name it, you have to know when you see it! What is an Ionic Compound? How to identify an Ionic Compound?
Naming Ionic Compounds
What is an Ionic Compound?How to identify an Ionic Compound? Metal and non-metal bonded togetherPositive and negative ionsIONs and IONic compound
Ionic or Covalent Compound?
1. NaCl 2. CH4 3. S5Br18 4. MgO 5. NO
Naming Ionic Compounds (copy)
Metal ion = name stays the sameNon-metal ion = change the ending to "-ide" Example: NaCl = Sodium ChlorideNa = SodiumCl = Chlorine >>> change ending to chloride
Naming Ionic Compounds
Examples: 1. Li3N 2. CaO 3. ZnS 4. AlP
Naming Ionic Compounds
Examples: 1. Li3N = Lithium Nitride 2. CaO = Calcium Oxide 3. ZnS = Zinc Sulphide 4. AlP = Aluminum Phosphide
Chemical Names to Formulas
Write the chemical formula of Potassium Iodide. Find the charge of each ionPotassium ion = K+1Iodine ion = I-1 The ratio is 1 to 1, so the formula is KI
Chemical Names to FormulasWrite the chemical formula of Potassium Oxide. Find the charge of each ionPotassium ion = K+1
Oxygen ion = O-2
The ratio is 1 to 2, so there must be 2 K for each O = K2OOR cross the charges down
Chemical Names to Formulas
Write the chemical formula for Aluminum Nitride. Find the charge of each ion.Aluminum ion = Al+3 Nitrogen ion = N-3
Ratio is 3 to 3, or Al3N3 Reduce like a fraction.AlN
Practice Problems
TextbookPage 187 - formula to namesPage 188 - names to formula
Multivalent Metal Ionic Compounds
Multivalent- Multi means more than one- Valent refers to the valence electrons So multivalent metals are metals with more than one charge. Example: Copper, Cu (#29)It can be Cu+1 or Cu +2 . Need to know which one!
Multivalent Metal Ionic Compounds
Write the chemical formula for: 1. Copper (I) fluoride 2. Copper (II) fluoride 3. Copper (II) nitride 4. Copper (II) oxide
Multivalent Metal Ionic Compounds
Write the chemical formula for: 1. Copper (I) fluoride = CuF 2. Copper (II) fluoride = CuF2 3. Copper (II) nitride = Cu3N2 4. Copper (II) oxide = CuO
Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)in the chemical name. Examples:Write the chemical name of:1. CuF2. CuCl23. PbO4. PbO2
Multivalent Metal Ionic Compounds
Use brackets ( ) and Roman numerals (I, II, III, IV, V, VI, ...)in the chemical name. Examples:Write the chemical name of:1. CuF = Copper (I) Fluoride2. CuCl2 = Copper (II) Chloride3. PbO = Lead (II) Oxide4. PbO2 = Lead (IV) Oxide
Polyatomic Ions
Poly = manyatomic = atomsPolyatomic Ions = ions with many different atoms. They stick together, treat them as one thing.Look in the table for the name and formula. Example: Sodium Nitrate = NaNO3 Sodium ion = Na+ Nitrate ion = NO3-
Polyatomic Ions
Use brackets to show how many polyatomic ions. Example: Zinc HydroxideZinc ion = Zn+2 Hydroxide ion = OH-1
Zn(OH)2
Polyatomic Ions
ExamplesWrite the name of:1. LiCH3COO2. Mg3(PO3)2
3. CrSO4
Write the formula of:4. Calcium Perchlorate5. Lead (IV) Chromate6. Ammonium Sulfite
Polyatomic Ions
ExamplesWrite the name of:1. LiCH3COO = Lithium Acetate2. Mg3(PO3)2 = Magnesium Phosphite3. CrSO4 = Chromium (II) SulfateWrite the formula of:4. Calcium Perchlorate = Ca(ClO4)2 5. Lead (IV) Chromate = Pb(CrO4)2 6. Ammonium Sulfite = (NH4)2SO3
Polyatomic Ions
Practice ProblemsTextbookPage 193
Naming Covalent Compounds
Check that it IS a covalent compound first!Two non-metals Recall: Ionic or Covalent Compound?1. NaCl2. CH4 3. S5Br18 4. MgO5. NO
Naming Covalent Compounds
Use a prefix to show how many of each element First element - name stays the same. Only add a prefix if there is more than one. Second element - change the ending to "-ide" Example: CO2 = Carbon dioxide
Naming Covalent Compounds
Prefixes1 mono2 di3 tri4 tetra5 penta6 hexa7 hepta8 octa9 nona 10 deca
Naming Covalent Compounds
ExamplesWrite the name of:1. P2Br3
2. SO4
3. F5O10 Write the formula of:1. dicarbon trinitride2. hexaoxygen heptaiodide3. octabromine monohydride
Naming Covalent Compounds
Write the name of:1. P2Br3 = diphosphorous tribromide2. SO4 = sulfur tetraoxide3. F5O10 = pentafluorine decaoxideWrite the formula of:1. dicarbon trinitride = C2N3 2. hexaoxygen heptaiodide = O6I7
3. octabromine monohydride = Br8H
Naming Covalent Compounds
Practice ProblemsTextbook Pg 195
Diatomic Elements
H2 = hydrogenN2 = nitrogenO2 = oxygenF2 = fluorineCl2 = chlorineBr2 = bromineI2 = iodine
Common Mistakes
Be careful:Sulfide = S-2 Sulfate = SO4
-2 Sulfite = SO3-2
Sulfur tetraoxide = SO4 Sulfur trioxide = SO3 Nitride = N-3 Nitrate = NO3
-2 Nitrite = NO2-1
Nitrogen dioxide = NO2 Nitrogen trioxide = NO3
Naming Everything
Ionic, Covalent, Multivalent, Polyatomic will all be mixed together. You need to tell them apart to name them. Practice ProblemsTextbook Page 197, 201
Recommended