You have an aqueous solution that contains the following ions: lead(II), sodium, iron(III), and potassium ions. You need to devise a way to separate the ions from one another. Which statement regarding your method is FALSE?
A. Lead(II) ions can be precipitated as PbCl_(2) 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 HNO_(3)(aq) or NH_(3)(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.