Recent questions tagged physical-chemistry

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The cell emf depends on

asked Jul 21, 2014 by sreemathi.v

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A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.Within the cell,it is important to prevent mixing or direct contact of

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The cathode of the cell might be

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The anode of the cell might be

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The cell emf could be increased above the standard emf by

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The standard emf of the cell is

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The contribution made to the standard emf of the cell by reduction half-cell is

asked Jul 21, 2014 by sreemathi.v

1 answer

A galvanic cell which makes use of the following reaction at 298K. $Cr_2O_7^{2-}+14H^++6Fe^{2+}\rightarrow 2Cr^{3+}+6Fe^{3+}+7H_2O$.Given : $E^{\large\circ}(Cr_2O_7^{2-},H^+,Cr^{3+}|Pt)=1.33V;E^{\large\circ}(Fe^{3+},Fe^{2+}|Pt)=0.77V$.The contribution made to the standard emf of the cell by oxidation half-cell is

asked Jul 21, 2014 by sreemathi.v

1 answer

Given that $E^{\large\circ}_{Fe^{3+}|Fe}$ and $E^{\large\circ}_{Fe^{2+}|Fe}$ are -0.36V and -0.439V,respectively.The value of $E^{\large\circ}_{Fe^{3+},Fe^{2+}|Pt}$ would be

asked Jul 21, 2014 by sreemathi.v

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The value of $E_{H_2O|H_2(1\;bar)|Pt}$ at 298K would be

asked Jul 21, 2014 by sreemathi.v

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Given that $E_{H_2O|H_2(1\;bar)|Pt}=0$ at 298K.The pressure of $H_2$ gas would be

asked Jul 21, 2014 by sreemathi.v

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Given that $E^{\large\circ}$ values of $Ag^+|Ag,K^+|K,Mg^{2+}|Mg$ and $Cr^{3+}|Cr$ are 0.80V,-2.93V,-2.37V,and -0.74V,respectively.Which of the following orders regarding the reducing power of metals is correct?

asked Jul 21, 2014 by sreemathi.v

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By how much will the potential of half-cell $Cu^{2+}|Cu$ change if the solution is diluted to 100 times at 298K?

asked Jul 21, 2014 by sreemathi.v

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The reduction potential of hydrogen half-cell will be negative if

asked Jul 21, 2014 by sreemathi.v

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Given : $E^{\large\circ}(Cu^{2+}|Cu)=0.337V$ and $E^{\large\circ}(Sn^{2+}|Sn)=-0.136V$.Which of the following statements is correct?

asked Jul 21, 2014 by sreemathi.v

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Two half cells have potentials -0.76V and -0.13V respectively.A galvanic cell is made from these two-half cells.Which of the following statements is correct?

asked Jul 21, 2014 by sreemathi.v

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Which of the following facts regarding the movement of anions in the solution is correct

asked Jul 21, 2014 by sreemathi.v

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