Naming Compounds Ionic Compound n Formed with a

Naming Compounds

Ionic Compound n Formed with a metal and nonmetal l Rules for naming: 1. 2. 3. Write the name of the positively charged ion first. (Usually a metal) Write the name of the negatively charged ion second. (Usually a nonmetal) For the second ion, keep the base of the name and replace the ending with “ide”

Example of Ionic Compound Na. Cl = Sodium Chloride (chlorine becomes chloride) 1. 2. KI = Potassium Iodide (Iodine becomes Iodide) 3. Mg. O = Magnesium Oxide (Oxygen become oxide)

Polyatomic Ion n These are tightly bound groups of atoms that behave as a unit and carry a charge n SEE LIST PROVIDED TO MEMORIZE NAME, FORMULA and CHARGE

Naming Compounds with Polyatomic Ions n Write the name of the positively charged ion first. (May be the polyatomic ion) n Write the name of the negatively charged ion second. (May be the polyatomic ion) n If the second ion is not the polyatomic ion, keep the base name and add “ide”. n Wherever the polyatomic ion is found, its name remains as learned.

Example of a compound containing a polyatomic ion n Na. NO 3 = Sodium Nitrate n NH 4 F = Ammonium Fluoride

Naming Acids n Acids usually begin with hydrogen l n n n Hydrogen and a nonmetal Named hydro – (base name of element) – ic acid HCl l n Hydrochloric acid HF l n Ex: HCl Hydrofluoric acid HBr l Hydrobromic acid

Continuing Naming Acids n n n If the acid contains a polyatomic ion then…. Polyatomic ions end in –ate l Change to – “ic acid” Polyatomic ions that end in –ite l Change to – “ous acid” l l EX: H 2 SO 4 Sulfate n l Sulfuric acid H 2 SO 3 Sulfite n Sulfurous acid

Naming Bases n Most bases end with hydroxide n Name metal then add word “hydroxide” n EX: Na. OH l Sodium Hydroxide