Electrochemistry questions
1808 published questions with worked solutions.
- H_2 cannot be displaced by
- The standard electrode potentials of Ag^+ / Ag is +0.80 V and Cu^+ / Cu is +0.34 V. These electrodes are connected through a salt...
- The emf of the cell, Ag ,| ,Ag^+(0.1 M) ,|| ,Ag^+(1 M) ,| ,Ag at 298 K is
- Which of the following metals can replace zinc from ZnSO_4 solution?
- Aluminium displaces hydrogen from dilute HCl whereas silver does not. The emf of a cell prepared by combining Al/Al^ 3+ and...
- What will be the electrode potential of a hydrogen electrode filled with HCl solution of pH value 1.0?
- The emf of the cell Ni ,| ,Ni^ 2+ (1.0 M) ,|| ,Au^ 3+ (1.0 M) ,| ,Au is [E^ ( Ni^ 2+ /Ni ) = -0.25 V and E^ ( Au^ 3+ /Au ) = +1.5...
- A galvanic cell with electrode potential of 'A' = +2.23 V and 'B' = -1.43 V. The value of E^ _ cell is
- Given standard electrode potentials Fe^ 2+ +2e^- Fe , E^ = -0.440 V Fe^ 3+ +3e^- Fe , E^ = -0.036 V The standard electrode...
- Out of Cu, Al, Fe and Zn, the metal which can displace all the others from their salt solution is
- Zn^ 2+ +2e^- Zn (s); E^ = -0.76 V Cu^ 2+ +2e^- Cu (s); E^ = +0.34 V Which of the following is spontaneous?
- The standard reduction potentials for the half-cell reactions are Zn^ 2+ +2e^- Zn ; E^ = -0.76 V Fe^ 2+ +2e^- Fe ; E^ = -0.44 V...
- What is the potential of a platinum wire dipped into a solution that is 0.1 M in Sn^ 2+ and 0.01 M in Sn^ 4+ (taking E^ as the...
- Sn^ 4+ + 2e^- Sn^ 2+ , E^ = 0.13 V Br_2 + 2e^- 2 Br^- , E^ = 1.08 V Calculate K_ eq for the cell reaction for the cell formed by...
- The standard oxidation potentials of Zn, Cu, Ag and Ni electrodes are +0.76, -0.34, -0.80 and +0.25 V respectively. Which of the...
- Electrode potential of the hydrogen electrode is ....... volt.
- For the redox reaction, Zn (s)+ Cu^ 2+ (0.1 M) Zn^ 2+ (1 M)+ Cu (s) taking place in a cell, E^ _ cell is 1.10 V. E_ cell for the...
- E^ for Fe^ 2+ +2e^- Fe is -0.44 V and E^ for Zn^ 2+ +2e^- Zn is -0.76 V; thus
- For a cell reaction involving a two-electron change, the standard emf of the cell is found to be 0.295 V at 25^ C. The...
- The cell reaction of a cell is Mg (s)+ Cu^ 2+ (aq) Cu (s)+ Mg^ 2+ (aq). If the standard reduction potentials of Mg and Cu are...
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