9.3 Naming and Writing Formulas for Molecular Compounds 1 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Chapter 9 Chemical Names and Formulas 9.1 Naming Ions 9.2 Naming and Writing Formulas for Ionic Compounds 9.3 Naming and Writing Formulas for Molecular Compounds 9.4 Naming and Writing Formulas for Acids and Bases 9.5 The Laws Governing How Compounds Form

9.3 Naming and Writing Formulas for Molecular Compounds 2 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Do Now: Write formulas for 1. Calcium Carbonate 2. Iron (III) Sulfate Write names for 3. Al(MnO 4 ) 3 4. Cu 2 O

9.3 Naming and Writing Formulas for Molecular Compounds 3 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Binary molecular compounds are composed of two nonmetals. Two nonmetals can combine in more than one way. C O O = C = O Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 4 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Binary Molecular Compounds COCO 2 Does NOT occur naturally in the atmosphereOccurs naturally in the atmosphere Result of oxygen starved combustion in improperly ventilated fuel-burned equipment Natural by product of respiration, fermentation, chemical reactions, and combustion fossil fuels/woods Common type of fatal poisoningPoisoning is rare Flammable gasNon-flammable gas Symptoms: confusion, nausea, lassitude, syncope, cyanosis, chest pain, abdominal pain Symptoms: dyspnea, sweating, increased heart rate, frostbite, convulsion, panic, memory problems Target organ: lungs, blood, central nervous system Target organ: respiratory system OSHA permissible exposure limit: 50 ppmOSHA permissible exposure limit: 5,000 ppm

9.3 Naming and Writing Formulas for Molecular Compounds 5 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Prefixes in the names of binary molecular compounds help distinguish compounds containing different numbers of atoms, such as CO and CO 2. Binary Molecular Compounds Naming Binary Molecular Compounds Prefixes Used in Naming Binary Molecular Compounds PrefixNumber mono-1 di-2 tri-3 tetra-4 penta-5 hexa-6 hepta-7 octa-8 nona-9 deca-10

9.3 Naming and Writing Formulas for Molecular Compounds 6 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Prefixes tell how many atoms of an element are present in each molecule of the compound. mono- is used for the single oxygen atom in CO. di- is used for the two oxygen atoms in CO 2. Binary Molecular Compounds Naming Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 7 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. To name a binary molecular compound, use the following guidelines. 1.Write the names of the elements in the order listed in the formula. Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 8 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. To name a binary molecular compound, use the following guidelines. 1.Write the names of the elements in the order listed in the formula. 2.Use prefixes appropriately to indicate the number of each kind of atom. Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 9 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. To name a binary molecular compound, use the following guidelines. 1.Write the names of the elements in the order listed in the formula. 2.Use prefixes appropriately to indicate the number of each kind of atom. If just one atom of the first element is in the formula, omit the prefix mono- for that element. Also, the vowel at the end of a prefix is sometimes dropped when the name of the element begins with a vowel. Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 10 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. To name a binary molecular compound, use the following guidelines. 1.Write the names of the elements in the order listed in the formula. 2.Use prefixes appropriately to indicate the number of each kind of atom. If just one atom of the first element is in the formula, omit the prefix mono- for that element. Also, the vowel at the end of a prefix is sometimes dropped when the name of the element begins with a vowel. 3.End the name of the second element with the suffix -ide. Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 11 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. CO - carbon monoxide CO 2 - carbon dioxide. Cl 2 O 8 - dichlorine octoxide. Binary Molecular Compounds Naming Binary Molecular Compounds

9.3 Naming and Writing Formulas for Molecular Compounds 12 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Sample Problem 9.6 Naming Binary Molecular Compounds Name the following binary molecular compounds. a. N 2 O b. PCl 3

9.3 Naming and Writing Formulas for Molecular Compounds 13 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Sample Problem 9.6 Naming Binary Molecular Compounds Name the following binary molecular compounds. a. N 2 O - dinitrogen monoxide b. PCl 3 - phosphorus trichloride

9.3 Naming and Writing Formulas for Molecular Compounds 14 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Sample Problem 9.7 Writing Formulas for Binary Molecular Compounds Write formulas for the following binary molecular compounds. a. nitrogen trifluoride b. disulfur dichloride

9.3 Naming and Writing Formulas for Molecular Compounds 15 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Sample Problem 9.7 Writing Formulas for Binary Molecular Compounds Write formulas for the following binary molecular compounds. a. nitrogen trifluoride - b. disulfur dichloride - NF 3

9.3 Naming and Writing Formulas for Molecular Compounds 16 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Air Pollution

9.3 Naming and Writing Formulas for Molecular Compounds 17 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

9.3 Naming and Writing Formulas for Molecular Compounds 18 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

9.3 Naming and Writing Formulas for Molecular Compounds 19 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved.

9.3 Naming and Writing Formulas for Molecular Compounds 20 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. Air Pollution Air pollution increased significantly after Industrial Revolution (1800’s) and introduction of automobiles (1900’s) Clean Air Act required EPA to establish national air quality standards for six common “criteria pollutants” Acid rain forms when clean rain comes in contact with air pollutants like SO 2, CO 2, and NO x

9.3 Naming and Writing Formulas for Molecular Compounds 21 > Copyright © Pearson Education, Inc., or its affiliates. All Rights Reserved. END OF 9.3