1 / 8

Chemistry 111/112

Chemistry 111/112. Chapter Nine: Chemical Names and Formulas. Naming Ions. Ions form ionic compounds – mainly monatomic ions which consist of a single atom with a positive or negative charge Metals tend to lose e-, forming a positive ion ( cation )

edythe
Télécharger la présentation

Chemistry 111/112

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. Chemistry 111/112 Chapter Nine: Chemical Names and Formulas

  2. Naming Ions • Ions form ionic compounds – mainly monatomic ions which consist of a single atom with a positive or negative charge • Metals tend to lose e-, forming a positive ion (cation) • When atoms gain e-, they become a negative ion (anion) • Their name is changed using the suffix –ide

  3. Ions of Transition Metals • Many form cations with more than one charge • The charge is determined by the number of e- lost • When naming these ions, use Roman numerals to determine which charge is being used • When a transition metal only has one charge, Roman numerals do not have to be used • Table 9.2, p. 255

  4. Polyatomic Ions • These ions are composed of more than one atom but only have one overall charge • They behave as a unit and are not separated • Most of their suffixes are –ite or –ate • When they form ionic compounds, the ending of their name does not change • Table 9.3, p. 257

  5. Naming Binary Ionic Compounds • A binary compound is composed of two elements and can either be ionic or molecular • If it is ionic and you know its formula, you can write its name • Always begins with the cation • The name does not change • If there is more than one charge, indicate it with a Roman numeral • Always ends with a nonmetallic anion • The name ends in –ide

  6. Writing Formulas for Binary Ionic Compounds • If you know the name, you can write its formula • Write the symbol of the cation with the charge • Do the same thing for the anion • Criss cross the charges • Reduce to lowest terms

  7. Example • Write the name of the following compounds: CaCl2 Fe2O3 • Write the formula of the following compounds: barium sulfide nickel (II) fluoride Q. 10 - 11, page 263; Q. 12 – 13, page 265

  8. Naming Compounds with Polyatomic Ions • When a compound’s formula has more than two capital letters • Identify the polyatomic ion • Name the metallic cation • Name the nonmetallic anion – do not change its ending • Ex. LiCN = lithium cyanide, NH4OH = ammonium hydroxide, CaCO3 = calcium carbonate

More Related