October 2019 1 91 Report
Pada oksidasi Fe2+ dengan oksidator Cr2O72-. dalam suasana asam menurut reaksi

a Fe2+ + b H+ + c Cr2O72- ===> d Fe3+ + e Cr3+ +7H2O

maka koefisien reaksi a,b,c,d,e berturut turut adalah....​

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