What is the ionic molality of potassium ions in 1.18 molal solution? Potassium phosphate. All right, so we want the ionic molality of potassium ions. All right, So we're going to say ionic molality is just osmolality. So here it will equal the ions of potassium ion times the molality of the compound.
If we break this up, it breaks up into three potassium ions plus one phosphate ion. So how many potassium ions do we have? We have three, so that would be three times. Now the molality of the entire compound is 1.18 mol, so 3×1.18 mol gives us the ionic molality of potassium ions.
So that will give us option E as our correct answer. So it would be 3.54 molal of potassium ions.