InterviewSolution
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InterviewSolution
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(i) Complete the following equations : (a) `2MnO_(4)^(-)+ 5SO_(3)^(2-)+6H^(+)to` (b) `Cr_2O_(7)^(2-)+6Fe^(2+)+14H^(+)to` (ii) Based on the data, arrange `Fe^(2+), Mn^(2+) and Cr^(2+)` in the increasing order of stability of `+2` oxdiation state . `E^(@) Cr^(3+)//Cr^(2+)=-0.4V` `E^(@) Mn^(3+)//Mn^(2+)=01.5V` `E^(@) Fe^(3+)//Fe^(2+)=+08V` |
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Answer» (i)(a) `2MnO_4^(-)+5SO_(3)^(2-)+6H^(+)to 2Mn^(2+)+3H_2O+5SO_(4)^(2-)` (b) `Cr_2O_7^(2-)to 6Fe^(2+)+14H^(+)to 2Cr^(3+)+6Fe^(3+)+7H_2O` (ii) `E^(@) Cr^(3+)//Cr^(2+)=-0.4V` `E^(@) Mn^(3+)//Mn^(2+)=01.5V` `E^(@) Fe^(3+)//Fe^(2+)=+08V` Increasing order of stability of `+2` oxidation state is : |
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