It was observed that KI concentrations (0.01, 0.1 and 1.0 M)
affected the indicator color change. The lower KI concentration
(0.01 M) provides longer timing for change in indicator color,
within2–3 sec, while 1 and 0.1 M KI provide faster timing (1–
2 sec). Since the higher KI concentration, the higher mass transfer
rate of iodide to working electrode, although mass transfer rate was
promoted with convection from nitrogen gas blowing