Aniline, abbreviated NH 2 , where is C 6 H 5 , is an important organic

Aniline, abbreviated ϕNH₂, where ϕ is C₆H₅, is an important organic base used in the manufacture of dyes. It has K_b = 4.3 * 10^-10. In a certain manufacturing process, it is necessary to keep the concentration of ϕNH₃⁺ (aniline’s conjugate acid, the anilinium ion) below 1.0 * 10^-9 M in a solution that is 0.10 M in aniline. Find the concentration of NaOH required for this process.