Figure 7:
Arrhenius plot for the reaction of MB+ with Na
2
SO
3
in the presence and absence of transition metal ion catalyst. ([MB
+
]= 20 mg/dm
3
; [SO
3
2−
] = 1.0mol / dm ; [M
2+
] = 0.3 mg/dm
3
; pH= 8-9; T= 30°C).
