InterviewSolution
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InterviewSolution
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For the following elecrochemical cell at 298K `Pt(s)|H_(2)(g,1"bar")|H^(+)(aq,1M)||M^(4+)(aq),M^(2+)(aq)|Pt(s)` `E_(cell)=0.092V` when `([M^(2+)(aq)])/([M^(4+)(aq)])=10^(x)` Given: `E_(M^(4+)//M^(2+))^(0)=0.151V,2.303(RT)/(F)=0.059V` the value of x isA. `-2`B. `-1`C. `1`D. `2` |
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Answer» Correct Answer - D Anode: `H_(2)-2ehArr2H^(+)` `underline("Cathode: "M^(4+)+2ehArrM^(2+))` Net cell reaction: `H_(2)+M^(4+)hArr2H^(+)+M^(2+)` `E_(cell)=E_(cell)^(0)-(0.059)/(2)"log"([H^(+)]^(2)[M^(2+)])/([M^(4+)]xxP_(H_(2)))` `0.092=0.151-(0.059)/(2)log10^(x)` `0.092=0.151-(0.059)/(2)x` `(0.059x)/(2)=0.151-0.092` `0.059x=0.059xx2impliesx=2`. |
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