Nomenclature of Ionic Compounds

Question 1

For elements that can form more than one positive ion, the charge is indicated by a Roman numeral

Answer 1

Fe^2+ = Iron (II)
Fe^3+ = Iron (III)
Cu^+ = Copper (I)
Cu^2+ = Copper (II)

Question 2

Monatomic anions are named by dropping the ending of the name of the element and adding -IDE

Answer 2

H^- = hydride
F^- = fluoride
O^-2 = Oxide
S^-2 = Sulfide

Question 3

Polyatomic anions contain oxygen and are therefore called oxyanions. When an element forms two oxyanions, the name of the one with less oxygen ends in -ITE and the one with more oxygen ends in -ATE

Answer 3

NO2^- = Nitrite
NO3^- = Nitrate
SO3^-2 = Sulfite
SO4^-2 = Sulfate

Question 4

Prefixes are also used. HYPO- and hyper, written as PER- are used to indiacte less oxygen and more oxygen

Answer 4

ClO^- = Hypochlorite
ClO2^- = Chlorite
ClO3^- = Chlorate
ClO4^- = Perchlorate

Question 5

Polyatomic anions often gain one or more H+ ions to form anions of lower charge. The resulting ions are named by adding the word hydrogen or dihydrogen to the front of the anion’s name

Answer 5

HCO3^- = Hydrogen carbonate or bicarbonate

HSO4^- = Hydrogen sulfate or bisulfate

H2PO4^- = Dihydrogen phosphate

Question 6

Ammonium

Answer 6

NH4^+

Question 7

Acetate

Answer 7

C2H3O2^-

Question 8

Permanganate

Answer 8

MnO4^-