Presentation is loading. Please wait.

Presentation is loading. Please wait.

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.

Similar presentations


Presentation on theme: "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."— Presentation transcript:

1 Chapter 4.2 Naming 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. Li 3 N 2. CaO 3. ZnS 4. AlP

7 Naming Ionic Compounds Examples: 1. Li 3 N = 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 formula to names Page 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. CuCl 2 3. PbO 4. PbO 2

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. CuCl 2 = Copper (II) Chloride 3. PbO = Lead (II) Oxide 4. PbO 2 = 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 = NaNO 3 Sodium ion = Na + Nitrate ion = NO 3-

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. LiCH 3 COO 2. Mg 3 (PO 3 ) 2 3. CrSO 4 Write the formula of: 4. Calcium Perchlorate 5. Lead (IV) Chromate 6. Ammonium Sulfite

20 Polyatomic Ions Examples Write the name of: 1. LiCH 3 COO = Lithium Acetate 2. Mg 3 (PO 3 ) 2 = Magnesium Phosphite 3. CrSO 4 = Chromium (II) Sulfate Write the formula of: 4. Calcium Perchlorate = Ca(ClO 4 ) 2 5. Lead (IV) Chromate = Pb(CrO 4 ) 2 6. Ammonium Sulfite = (NH4) 2 SO 3

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. CH 4 3. S 5 Br 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: CO 2 = 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. P 2 Br 3 2. SO 4 3. F 5 O 10 Write the formula of: 1. dicarbon trinitride 2. hexaoxygen heptaiodide 3. octabromine monohydride

26 Naming Covalent Compounds Write the name of: 1. P 2 Br 3 = diphosphorous tribromide 2. SO 4 = sulfur tetraoxide 3. F 5 O 10 = pentafluorine decaoxide Write the formula of: 1. dicarbon trinitride = C 2 N 3 2. hexaoxygen heptaiodide = O 6 I 7 3. octabromine monohydride = Br 8 H

27 Naming Covalent Compounds Practice Problems Textbook Pg 195

28 Diatomic Elements H 2 = hydrogen N 2 = nitrogen O 2 = oxygen F 2 = fluorine Cl 2 = chlorine Br 2 = bromine I 2 = iodine

29 Common Mistakes Be careful: Sulfide = S -2 Sulfate = SO 4 -2 Sulfite = SO 3 -2 Sulfur tetraoxide = SO 4 Sulfur trioxide = SO 3 Nitride = N -3 Nitrate = NO 3 -2 Nitrite = NO 2 -1 Nitrogen dioxide = NO 2 Nitrogen trioxide = NO 3

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


Download ppt "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."

Similar presentations


Ads by Google