1 / 6

Ch. 7 – Chemical Formulas & Chemical Compounds

Ch. 7 – Chemical Formulas & Chemical Compounds. This chapter introduces methods for naming, writing, and identifying chemical compounds. Examples: CaCO 3 – limestone, NaOH – lye, HCl – muriatic acid, NaCl – table salt, C 6 H 12 O 6 – glucose, C 12 H 22 O 11 – sucrose.

kioko
Download Presentation

Ch. 7 – Chemical Formulas & Chemical Compounds

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript


  1. Ch. 7 – Chemical Formulas & Chemical Compounds • This chapter introduces methods for naming, writing, and identifying chemical compounds. • Examples: CaCO3 – limestone, NaOH – lye, HCl – muriatic acid, NaCl – table salt, C6H12O6 – glucose, C12H22 O11 – sucrose.

  2. Al2O3 – How many Al? How many O? • Al2(SO4)3 – How many Al,S, & O? • Monatomic ions form from a single atom • Ex. Na+, Cl -, Mg2+ • Cation- positive • Anion – Negative • Binary compounds are composed of 2 different elements. • Ex. Sodium chloride, Barium sulfide

  3. Naming Compounds • New system of nomenclature (Stock System) • Write the 1st element’s name  usually positive • Write the 2nd element’s name – use the suffix –ide • If the 1st element is a transition element (3-12) or an element with more than one charge, you need to place a roman numeral behind it to show its charge. • Be able to recognize if some of the elements in the compounds are polyatomic ions. • EXAMPLES: KI, Sr2F, CuCl, ZnS, Fe2O3

  4. Old System of Nomenclature • Instead of using roman numerals for elements with more than one charge, you use the following: • ous for the suffix of the element if it’s the lower charge. • ic for the suffix of the element if it’s the higher charge. • Pg. 20

  5. Nomenclature is the method of naming chemical compounds. • Oxyanions are polyatomic ions that contain oxygens • Ex. OH-, SO4- • Numerical Prefixes (Table 7-3) – pg. 212 • Ex. 2 –di, 3 – tri, 4 – tetra, 5 - pent • Binary compounds with prefixes: • NO2 – nitrogen dioxide • N2O5 - ?

  6. Binary Acids & Oxyacids • Binary acids are solutions of binary compounds with hydrogen at the beginning. • Ex. HCl, HF, HBr • Oxyacids contain H,O, and a third element. • Ex. HNO3, H2CO3, H2SO4, H3PO4

More Related