Electrochemistry questions
1808 published questions with worked solutions.
- The electrode potential of Zn^ 2+ /Zn is -0.76 V and that of Cu^ 2+ /Cu is +0.34 V. The emf of the cell constructed between these...
- A gas X at 1 atm is bubbled through a solution containing a mixture of 1 M Y^- and 1 M Z^- at 25^ . If the order of reduction...
- In a cell that utilizes the reaction Zn (s)+2 H^+ (aq) Zn^ 2+ (aq)+ H_2 (g), addition of H_2SO_4 to the cathode compartment will
- Given MnO_4^- +8 H^+ +5e^- Mn^ 2+ +4 H_2O , E^ =1.51 V and MnO_2 +4 H^+ +2e^- Mn^ 2+ +2 H_2O , E^ =1.23 V, E^ _ MnO_4^-|MnO_2 is
- Which of the following statements is correct? A galvanic cell converts
- For the reaction Co +2 Ag^+ Co^ 2+ +2 Ag , which of the following combinations of concentrations will form a cell with the...
- The E^ values for the half-cells Fe/Fe^ 2+ and Cu/Cu^ 2+ are -0.44 V and +0.32 V respectively. Then
- The standard reduction potentials for the half-reactions are Zn^ 2+ +2e^- Zn , E^ =-0.76 V and Fe^ 2+ +2e^- Fe , E^ =-0.41 V. The...
- Which of the following is displaced by Fe?
- The reaction 12 H_2 (g)+ AgCl (s) H^+ (aq)+ Cl^- (aq)+ Ag (s) occurs in the galvanic cell
- 1.05 g of a lead ore containing an impurity of Ag was dissolved in HNO_3 and the volume was made up to 350 mL. An Ag electrode...
- The standard electrode potential of the cell H_2 ,| , H^+ ,|| , Ag^+ ,| , Ag is (given E^ _ Ag^+/Ag =0.80 V)
- The standard reduction potentials for Fe^ 2+ /Fe and Sn^ 2+ /Sn electrodes are -0.44 V and -0.14 V respectively. For the cell...
- When a lead storage battery is charged, it acts as
- The metal that forms a self-protecting film of oxide to prevent corrosion is
- On the basis of the electrochemical theory of aqueous corrosion, the reaction occurring at the cathode is
- Which of the following statements is true for fuel cells?
- Which of the following reactions is used to make a fuel cell?
- An electric current is passed through a silver nitrate solution using silver electrodes. 10.79 g of silver was found to be...
- In the electrolysis of aqueous copper sulphate (with inert electrodes, continued after the dissolved Cu^ 2+ is depleted), the...
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