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Homework:

Homework:. Read section 9.2 (pages 248-251) Do problems 13-17 on page 249 and 18-22 on page 250. Answer question 23 on page 251. Check your answers in the back of the book, on page 926. Daily Quiz 247. Write the Lewis structures for the following molecules. Daily Quiz 247.

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Homework:

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  1. Homework: • Read section 9.2 (pages 248-251) • Do problems 13-17 on page 249 • and 18-22 on page 250. • Answer question 23 on page 251. • Check your answers in the back of the book, on page 926.

  2. Daily Quiz 247 • Write the Lewis structures for the following molecules

  3. Daily Quiz 247 • One atom of carbon and two atoms of oxygen. • One atom of oxygen and two atoms of chlorine. • Two atoms of iodine. • Four atoms of fluorine and one atom of silicon.

  4. Daily Quiz 247 • One atom of carbon and two atoms of oxygen. • O=C=O

  5. Daily Quiz 247 • 2. One atom of oxygen and two atoms of chlorine. • Cl-O-Cl

  6. Daily Quiz 247 • Two atoms of iodine. • I I

  7. Daily Quiz 247 • 4. Four atoms of fluorine and one atom of silicon. • F • F-Si-F • F

  8. Naming Molecules

  9. Naming Molecules • P2O5

  10. Naming Molecules • Rule 1: • The first element in the formula is always named first, using the entire element name. • P2O5

  11. Naming Molecules • Rule 1: • The first element in the formula is always named first, using the entire element name. • P2O5 • phosphorous

  12. Naming Molecules • Rule 2: • The second element in the formula is named using the root of the element and adding the suffix –ide. • P2O5 • phosphorous

  13. Naming Molecules • Rule 2: • The second element in the formula is named using the root of the element and adding the suffix –ide. • P2O5 • phosphorous oxide

  14. Naming Molecules • Rule 3: This is new! • P2O5 • phosphorous oxide

  15. Naming Molecules • Rule 3: • Prefixes are used to indicate the number of atoms of each type that are present in the compound. • P2O5 • phosphorous oxide

  16. Naming Molecules • mono- • di- • tri- • tetra- • penta- • 6 hexa- • 7 hepta- • octa- • nona- • deca- • P2O5 • phosphorous oxide

  17. Naming Molecules • mono- • di- • tri- • tetra- • penta- • 6 hexa- • 7 hepta- • octa- • nona- • deca- • P2O5 • diphosphorous pentoxide

  18. Naming Molecules • Exception: • The first element never uses the prefix mono-.

  19. Naming Molecules • Exception: • The first element never uses the prefix mono-. • CO • carbon monoxide

  20. Naming Molecules • Exception: • The first element never uses the prefix mono- • CO • carbon monoxide • Not monocarbon monoxide.

  21. Naming Molecules • You will have to use these rules on your next test.

  22. Naming Molecules • You will have to use these rules on your next test. • You may use the flow chart on any test or quiz I give for the rest of the year.

  23. Common Names

  24. Common Names • We don’t usually talk about dihydrogen monoxide

  25. Common Names • We don’t usually talk about dihydrogen monoxide • H2O

  26. Common Names • We don’t usually talk about dihydrogen monoxide. • It’s just called water. • H2O

  27. Common Names • dihydrogen monoxide • H2O • water

  28. Common Names • nitrogen trihydride

  29. Common Names • nitrogen trihydride • NH3

  30. Common Names • nitrogen trihydride • NH3 • ammonia

  31. Common Names • dinitrogen tetrahydride

  32. Common Names • dinitrogen tetrahydride • N2H4 • hydrazine

  33. Common Names • dinitrogen monoxide

  34. Common Names • dinitrogen monoxide • N2O

  35. Common Names • dinitrogen monoxide • N2O • nitrous oxide • laughing gas

  36. Common Names • nitrogen monoxide

  37. Common Names • nitrogen monoxide • NO • nitric oxide

  38. Common Names • I will not ask you to memorize common names. • I just want you to know they exist.

  39. Naming Acids • If a molecule forms an acid when dissolved in water, there are other rules.

  40. Naming Acids • Acid rule 1: binary acids (HX)

  41. Naming Acids • Acid rule 1: binary acids (HX) • hydro________ic acid • Fill in the blank with the root of the element

  42. Naming Acids • Acid rule 1: binary acids (HX) • hydro________ic acid • Fill in the blank with the root of the element • HCl

  43. Naming Acids • Acid rule 1: binary acids (HX) • hydro________ic acid • Fill in the blank with the root of the element • HCl • hydrochloric acid

  44. Naming Acids • Acid rule 1: binary acids (HX) • hydro________ic acid • Fill in the blank with the root of the element • HBr

  45. Naming Acids • Acid rule 1: binary acids (HX) • hydro________ic acid • Fill in the blank with the root of the element • HBr • hydrobromic acid

  46. Naming Acids • Acid rule 2: polyatomic ions (HXY) with no oxygen

  47. Naming Acids • Acid rule 2: polyatomic ions (HXY) with no oxygen • hydro________ic acid • Fill in the blank with the root of the polyatomic ion

  48. Naming Acids • Acid rule 2: polyatomic ions (HXY) with no oxygen • hydro________ic acid • Fill in the blank with the root of the polyatomic ion • Look it up on page 224

  49. Naming Acids • Acid rule 2: polyatomic ions (HXY) with no oxygen • hydro________ic acid • Fill in the blank with the root of the polyatomic ion • HCN

  50. Naming Acids • Acid rule 2: polyatomic ions (HXY) with no oxygen • hydro________ic acid • Fill in the blank with the root of the polyatomic ion • HCN • hydrocyanic acid

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