n(Fe2+)=1.08/72=0.015mol
n(Fe2+):n(K2Cr2O7)=6:1(每个Fe2+升高1价,每个K2Cr2O7降低6价,要满足化合价升降守恒)
n(K2Cr2O7)=0.0025mol
c=n/V=0.0025mol/0.025L=0.1mol/L
n(Fe2+)=1.08/72=0.015mol
n(Fe2+):n(K2Cr2O7)=6:1(每个Fe2+升高1价,每个K2Cr2O7降低6价,要满足化合价升降守恒)
n(K2Cr2O7)=0.0025mol
c=n/V=0.0025mol/0.025L=0.1mol/L