Electrochemistry questions
1808 published questions with worked solutions.
- The standard reduction potential E^ for the half reactions are as given: Zn Zn^ 2+ +2e^-, E^ = 0.76 V (oxidation potential) Cu...
- In a Daniel cell, the anode (the electrode at which oxidation occurs) is
- Which of the following reactions is correct for a given electrochemical cell at 25^ C? Pt ,| ,Br_2 (g) ,| , Br^- (aq) ,|| , Cl^-...
- In the electrochemical reaction, 2 Fe^ 3+ + Zn Zn^ 2+ +2 Fe^ 2+ , increasing the concentration of Fe^ 3+
- Dipping an iron article into a strongly alkaline solution of sodium phosphate
- The standard electrode potential of the hydrogen electrode at 1 M concentration and hydrogen gas at 1 atm pressure is
- What is the value of E_ cell ? Cr ,| ,Cr^ 3+ (0.1 M) ,|| , Fe^ 2+ (0.01 M) ,| , Fe Given E^ _ Cr^ 3+ /Cr = -0.74 V, E^ _ Fe^ 2+...
- The standard electrode potential is measured by
- Consider the following E^ values: E^ _ Fe^ 3+ /Fe^ 2+ =+0.77 V, E^ _ Sn^ 2+ /Sn =-0.14 V. Under standard conditions the potential...
- The reduction potential of the hydrogen half-cell will be negative if
- For the electrochemical cell, E^ ( M^+ | M ) = 0.44 V, E^ ( X | X^- ) = 0.33 V. From this data one can deduce that
- For the cell, Tl ,| ,Tl^+(0.001 M) ,|| ,Cu^ 2+ (0.1 M) ,| ,Cu , E_ cell at 25^ C is 0.83 V. E_ cell can be increased
- The rusting of iron takes place as follows: 2 H^+ +2e^-+ 12 O_2 H_2O (l); E^ =+1.23 V Fe^ 2+ +2e^- Fe (s); E^ =-0.44 V Calculate...
- Given the standard reduction potentials H^+ / 12 H_2 = 0 V and Fe^ 2+ /Fe^ 3+ = 0.77 V (i.e. E^ _ Fe^ 3+ /Fe^ 2+ =0.77 V), and...
- Calculate the equilibrium constant for the reaction, at 25^ C: Cu (s)+2 Ag^+ (aq) Cu^ 2+ (aq)+2 Ag (s), given E^ _ cell =0.47 V,...
- For a cell given below, Ag ,| ,Ag^+ ,|| ,Cu^ 2+ ,| ,Cu (anode on left, cathode on right) Ag^+ +e^- Ag , E^ =x Cu^ 2+ +2e^- Cu ,...
- The emf of the cell Zn ,/ ,Zn^ 2+ (1 M) ,|| , Cu^ 2+ (1 M) ,| , Cu (E^ _ Zn^ 2+ /Zn =-0.76 V, E^ _ Cu^ 2+ /Cu =+0.34 V) will be
- The E^ of Fe^ 2+ /Fe and Sn^ 2+ /Sn are -0.44 V and -0.14 V respectively. If the cell reaction is Fe + Sn^ 2+ Fe^ 2+ + Sn , then...
- A standard hydrogen electrode has zero electrode potential because
- Which of the following reactions cannot be a base for an electrochemical cell?
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