What are the molar concentrations of the ion in 0.26m aluminum sulfate? For c (so4^2-)

0.78 M for SO₄²⁻

Explanation:

The chemical formula for aluminium sulfate is Al₂ (SO₄) ₃

So for a concentration of 0.26 M you have in solution 0.26 moles of Al₂ (SO₄) ₃ in 1 liter of solution.

But you have three times more sulfate ions SO₄²⁻ in solution, so the molar concentration for this ion will be:

0.26 * 3 = 0.78 M