K2SO4 is a strong electrolyte. Determine the concentration of each of the individual ions in a 0.400 M K2SO4 solution.

Answer 1

As a srtong electrolyte, K₂SO₄ will dissociate completely into its 2 component ions as follows:

K₂SO₄ ==> 2K⁺ + SO₄^2- (note that 1 mole K₂SO₄ produces 2 moles K⁺ and 1 mole SO₄^2-)

Concentration of each ion is ...

[K⁺] = 2 x 0.400 M = 0.800 M

[SO₄^2-] = 1 x 0.400 M = 0.400 M