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Chapter 4.2 Naming Compounds

Chapter 4.2 Naming 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?

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Chapter 4.2 Naming Compounds

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  1. Chapter 4.2Naming Compounds

  2. 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?

  3. Naming Ionic Compounds What is an Ionic Compound? How to identify an Ionic Compound? Metal and non-metal bonded together Positive and negative ions IONs and IONic compound

  4. Ionic or Covalent Compound? 1. NaCl 2. CH4 3. S5Br18 4. MgO 5. NO

  5. Naming Ionic Compounds (copy) Metal ion = name stays the same Non-metal ion = change the ending to "-ide" Example: NaCl = Sodium Chloride Na = Sodium Cl = Chlorine >>> change ending to chloride

  6. Naming Ionic Compounds Examples: 1. Li3N 2. CaO 3. ZnS 4. AlP

  7. Naming Ionic Compounds Examples: 1. Li3N = Lithium Nitride 2. CaO = Calcium Oxide 3. ZnS = Zinc Sulphide 4. AlP = Aluminum Phosphide

  8. Chemical Names to Formulas Write the chemical formula of Potassium Iodide. Find the charge of each ion Potassium ion = K+1 Iodine ion = I-1 The ratio is 1 to 1, so the formula is KI

  9. Chemical Names to Formulas Write the chemical formula of Potassium Oxide. Find the charge of each ion Potassium ion = K+1 Oxygen ion = O-2 The ratio is 1 to 2, so there must be 2 K for each O = K2O OR cross the charges down

  10. 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

  11. Practice Problems Textbook Page 187 - formula to names Page 188 - names to formula

  12. 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!

  13. 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

  14. 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

  15. 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 2. CuCl2 3. PbO 4. PbO2

  16. 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) Fluoride 2. CuCl2 = Copper (II) Chloride 3. PbO = Lead (II) Oxide 4. PbO2 = Lead (IV) Oxide

  17. Polyatomic Ions Poly = many atomic = atoms Polyatomic 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-

  18. Polyatomic Ions Use brackets to show how many polyatomic ions. Example: Zinc Hydroxide Zinc ion = Zn+2 Hydroxide ion = OH-1 Zn(OH)2

  19. Polyatomic Ions Examples Write the name of: 1. LiCH3COO 2. Mg3(PO3)2 3. CrSO4 Write the formula of: 4. Calcium Perchlorate 5. Lead (IV) Chromate 6. Ammonium Sulfite

  20. Polyatomic Ions Examples Write the name of: 1. LiCH3COO = Lithium Acetate 2. Mg3(PO3)2 = Magnesium Phosphite 3. CrSO4 = Chromium (II) Sulfate Write the formula of: 4. Calcium Perchlorate = Ca(ClO4)2 5. Lead (IV) Chromate = Pb(CrO4)2 6. Ammonium Sulfite = (NH4)2SO3

  21. Polyatomic Ions Practice Problems Textbook Page 193

  22. Naming Covalent Compounds Check that it IS a covalent compound first! Two non-metals Recall: Ionic or Covalent Compound? 1. NaCl 2. CH4 3. S5Br18 4. MgO 5. NO

  23. 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

  24. Naming Covalent Compounds Prefixes 1    mono 2    di 3    tri 4    tetra 5    penta 6    hexa 7    hepta 8    octa 9    nona                10   deca

  25. Naming Covalent Compounds Examples Write the name of: 1. P2Br3 2. SO4 3. F5O10 Write the formula of: 1. dicarbon trinitride 2. hexaoxygen heptaiodide 3. octabromine monohydride

  26. Naming Covalent Compounds Write the name of: 1. P2Br3 = diphosphorous tribromide 2. SO4 = sulfur tetraoxide 3. F5O10 = pentafluorine decaoxide Write the formula of: 1. dicarbon trinitride = C2N3 2. hexaoxygen heptaiodide = O6I7 3. octabromine monohydride = Br8H

  27. Naming Covalent Compounds Practice Problems Textbook Pg 195

  28. Diatomic Elements H2 = hydrogen N2 = nitrogen O2 = oxygen F2 = fluorine Cl2 = chlorine Br2 = bromine I2 = iodine

  29. 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

  30. Naming Everything Ionic, Covalent, Multivalent, Polyatomic will all be mixed together. You need to tell them apart to name them. Practice Problems Textbook Page 197, 201

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