Question

How many K⁺ and S²⁻ ions would be in one formula unit of the ionic compound formed by these ions?

A) 1 K⁺ and 1 S²⁻
B) 2 K⁺ and 2 S²⁻
C) 1 K⁺ and 2 S²⁻
D) 2 K⁺ and 1 S²⁻

Answer 1

The formula unit of the ionic compound formed by one K⁺ ion and one S²⁻ ion is K₂SO₄.

Step-by-step explanation:

Potassium ions have a charge of 1+, while sulfate ions have a charge of 2-. We will need two potassium ions to balance the charge on the sulfate ion, so the proper chemical formula is K2SO4.