Question

Describe the ammonium ion, NH4+, and the sulfate ion, SO42-. What compounds would these ions form with potassium and fluoride ions

Answer 1

Make sure you include these points:

The atoms in each ion are bonded together covalently to form a single unit.

The charge is distributed over the entire ion.

The formula of ammonium fluoride is NH4F.

The formula of potassium sulfate is K2SO4.

Answer 2

Cations mix with anions, so you know NH4+ won't mix with K+ and SO4(2-) won't miix with F-. For the reason that NH4+ and F- together have single charges, they'll mix in a 1:1 ratio, NH4F. There's two charges on SO4(2-), so it'll need two K+ to mix with, K2SO4.