Question

A buffer solution is used in

• A. preparation of potash alum
• B. the removal of $PO_{4}^{3-}$ ions
• C. increasing the pH value of a solution
• D. precipitation of $Cr(OH)_{3}$ from $CrCl_{3}$

Answer 1

Answer: (B)

the removal of $PO_{4}^{3-}$ ions

Answer 2

A buffer solution is used in the removal of $PO_{4}^{3-}$ ions.