You Have an Aqueous Solution Containing Lead(II), Sodium, Iron(III), and Potassium

You have an aqueous solution containing lead(II) , sodium, iron(III) , and potassium ions.You need to devise a way to separate the ions from one another.Which statement below regarding your method is FALSE?

A) Lead(II) ions can be precipitated as PbCl₂ by adding a source of chloride ions.
B) Iron(III) ions can be precipitated as Fe(OH) ₃ by adding a source of hydroxide ions.
C) Adding HNO₃ (aq) or NH₃(aq) can be used to adjust the acidity or basicity of the solution.
D) Sodium and potassium cannot be separated by precipitation.
E) Adding a source of sulfate ions can separate potassium by precipitation.