Question

How do the following two elements bond together?
Cr3+ SO42-

Answer 1

Answer:

To name Cr2O3

1. Determine the charge of cation from the anion (o2-).

2Cr ions + 3O2- = ? + 3(2-) = ?-6 = 0

? = +6 +6/2Cr ions = +3

Cr ion = +3 Cr+3

2. Name the cation by the element name and use a Roman numeral in parenthesis to show its charge.

Cr3+ = chromium(3)

3. Write the name of anion with -ide ending.

chromium(3) oxide = Cr2O3.