Question

iron can form ions with charges of +2 and +3. what roman numeral is used in the iupac name to indicate the +3 charge?
i
ii
iii
i
iv
what is the correct iupac name for the ionic compound with the chemical formula fecl₂?
iron(iii) chloride
iron(1) chloride
iron(ii) chloride

Explanation:

In IUPAC naming of ionic compounds with transition - metals that can have multiple oxidation states, Roman numerals are used to indicate the oxidation state of the metal ion. The Roman numeral III represents the number 3. For the compound FeCl₂, iron has an oxidation state of + 2, and in IUPAC naming it is named iron(II) chloride.

Answer:

1. B. III
2. C. iron(II) chloride