Question

Write the correct name for the following four compounds. Use lower case. If roman numerals are needed, only use a space after the parentheses, not before. Example: manganese(II) oxide (not manganese (II) oxide). Remember to drop a vowel in the prefix if it precedes another vowel. Also use 'hydrogen carbonate' instead of 'bicarbonate'.

Answer 1

Ionic compounds with variable charge cations are named by writing the metal's name with its charge in Roman numerals, followed by the anion's name with the appropriate suffix or as a recognized polyatomic ion name.

Step-by-step explanation:

When naming ionic compounds with cations that can have variable charges, start with the name of the cation followed by the charge in Roman numerals. Then add the name of the anion, changing the anion's suffix to -ide if it is a single element, or using the proper name if it is a polyatomic ion. For example, the formulas for the ionic compounds given in the question are:

1. chromium(III) phosphide - CrP
2. mercury(II) sulfide - HgS
3. manganese(II) phosphate - Mn3(PO4)2
4. copper(I) oxide - Cu2O
5. iron(III) chloride dihydrate - FeCl3·2H2O