Consider the following equation; Cr2O7²-(aq) + 14H+(aq) + 6e- → 2Cr3+(aq) + 7H2O(I). The oxidation number of chromium changes from? By: Sunday|Published on: May 12|Categories: Chemistry WAEC| 0 comments A. -2 to + 3 B. – 2 to + 6 C. + 6 to + 3 D. + 7 to + 6 Correct Answer: Option C C. + 6 to + 3 Users Also Read These:The oxidation number of Fe in [Fe(CN)6]3- is?The oxidation number of nitrogen in Pb(NO3)2 is?What is the oxidation number of nitrogen in AI(NO3)3?The oxidation number of sulphur is +4 in?Consider the following ionic equation: Cr²O7²- +…SEE ALSO If 5.0cm‾³ of 0.200 mol dm‾³ Na2CO3 was diluted to 250cm‾³ solution; what would be the concentration of the resulting solution?