I need help generating two separate redox oxidation equations. ******University of Harvard extra practice questions*****

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I need help generating two separate redox oxidation equations.
******University of Harvard extra practice questions******
1). One equation is to show the generation of
[Co(phen)3]Br2 and then after oxidation to
give[Co(phen)3]Br3
The reagents used to generate
[Co(phen)3]Br2 were (CoSO4.7H2O),
(1,10 phenanthroline) (KBr), and washed with distilled H2O and
acetone.
The reagents used for the oxidation of
[Co(phen)3]Br2 were 1gram of the above
[Co(bipy)3]Br2, along with Bromine water (Br2 aq), and washed with
distilled H2O + acetone.
2) The other equation is to show the generation of
[Co(bipy)3]Br2 and then after oxidation to
give[Co(bipy)3]Br3.
The reagents used to generate
[Co(bipy)3]Br2 were (CoSO4.7H2O), (
2,2'-bipyridine C10H8N2), (KBr) and washed with distilled H2O and
acetone.
The reagents used for the oxidation of
[Co(bipy)3]Br2 were 1gram of the above
[Co(phen)3]Br2, Bromine water (Br2 aq), washed with distilled H2O
and acetone.
3) Finally, in order to find the % yield, what would be the
limiting reagent of each equation?
I think (CoSO4.7H2O) would be the limiting reagent in
both equations but I'm having trouble figuring out what the
equations would be for each 1) and 2). It seems like it needs to be
a redox oxidation equation with steps.
Are the below attachments correct????

I Need Help Generating Two Separate Redox Oxidation Equations University Of Harvard Extra Practice Questions 1 (118.54 KiB) Viewed 44 times

I Need Help Generating Two Separate Redox Oxidation Equations University Of Harvard Extra Practice Questions 2 (145.49 KiB) Viewed 44 times

2[Co(bpy)3]Br2 + Br2 ------> 2 [Co(bpy)3]Br3 2 [Co(Phen)3]Br2 + Br2 ------> 2 [Co(Phen)3]Br3 Explanation: formation of [Co(bipy)3]Br3 using (COSO4.7H2O), (2,2'-bipyridine C10H8N2) and (KBr). 2,2-bipyridine (bpy) Balanced equation for formation of [Co(bpy)3]Br2 3 bpy (aq) + CoSO4.7H20 (aq) + 2 KBr (aq) [Co(bpy)]Brą (aq) + K2SO4 (aq) + 7 H20 (1) Balanced equation for oxidation of [Co(bpy)]Br2 Dissociation of can be seen as follow [Co(bpy)3]Br2 (Co(bpy)]*2 + 2 Brº oxidation of any substance is associated with the loss of electron. so in this context (Co(bpy)31+2 losses an electron to from [Co(bpy)313 complex as follow: Oxidation half reaction 2 [Co(bpy)31+2 2 [Co(bpy)31+3 + 2 e Reduction half reaction Br2 + 2e 2 Br Overall reaction 2 [Co(bpy)31*2 + Brz 2 [Co(bpy)3]+3 + 2 Br Balancing the overall equation by adding 2 Br- we get the balanced equation as follow: 2 [Co(bpy)3]Br2 + Brz 2 [Co(bpy)3]Br3 +3 Co 3 Br -N N
formation of [Co(Phen)3]Br3 using (CoSO4.7H2O), (1,10 phenanthroline) and (KBr). 1,10-phenanthroline (phen) 2, 2' bipyridine and 1, 10-phenanthroline has same type of binding sides. So, cobalt form simialr type of complex with 1,10-phenanthroline as that of 2,2' bipyridine Balanced equation for formation of [Co(Phen)3]Br2 3 Phen (aq) + CoSO4.7H20 (aq) + 2 KBr (aq) [Co(Phen) 3Br2 (aq) + K2SO4 (aq) + 7 H2O (1) Balanced equation for oxidation of [Co(Phen)3]Br2 Dissociation of can be seen as follow Co(Phen)3]Br2 [Co(Phen)31*2 + 2 Br oxidation of any substance is associated with the loss of electron. so in this context [Co(Phen)31*2 losses an electron to from [Co(Phen)3] 3 complex as follow: Oxidation half reaction 2 [Co(Phen) 2 2 [Co(Phen)3]*3 + 2 e 2 Br Reduction half reaction Br2 + 2e Overall reaction 2 [Co(Phen)3]*2 + Bry 2 [Co(Phen);]*3 + 2 Br Balancing the overall equation by adding 2 Br- we get the balanced equation as follow: 2 [Co(Phen)3]Br2 + Bry > 2 [Co(Phen)3]Br3 +3 N ca 3 Br