Electrochemistry questions
1808 published questions with worked solutions.
- The cell Zn ,| ,Zn^ 2+ (1 M) ,|| ,Cu^ 2+ (1 M) ,| ,Cu (E^ _ cell =1.10 V) was allowed to be completely discharged at 298 K. The...
- Small quantities of solutions of compounds TX, TY and TZ are put into separate test tubes containing X, Y and Z solutions. TX...
- Which one of the following conditions will increase the voltage of the cell represented by the equation Cu (s)+2 Ag^+ (aq) Cu^ 2+...
- If the G^ of a cell reaction, AgCl +e^- Ag + Cl^- , is -21.20 kJ, the standard emf of the cell is
- Given the data at 25^ C: Ag + I^- AgI +e^-; E^ = 0.152 V Ag Ag^+ +e^-; E^ = -0.800 V What is the value of K_ sp for AgI?...
- Ni ,/ ,Ni^ 2+ [1.0 M] ,|| , Au^ 3+ [1.0 M] ,/ , Au where E^ for Ni^ 2+ /Ni is -0.250 V, and E^ for Au^ 3+ /Au is 0.150 V. The emf...
- The relationship between Gibbs' free energy change ( G) and emf (E) of a reversible electrochemical cell is given by
- 2 Fe^ 3+ +3 I^- 2 Fe^ 2+ + I_3^- . The standard reduction potentials in acidic conditions are 0.77 and 0.54 V respectively for...
- For the cell reaction Zn + Cu^ 2+ Zn^ 2+ + Cu , the cell representation is
- Cu^+ (aq) is unstable in solution and undergoes simultaneous oxidation and reduction, according to the reaction 2 Cu^+ (aq) Cu^...
- E^ _ Cu = 0.34 V, E^ _ Zn = -0.76 V (standard reduction potentials). A Daniel cell contains 0.1 M ZnSO_4 solution and 0.01 M...
- Calculate the emf of the cell Cu (s) ,| , Cu^ 2+ (aq) ,|| , Ag^+ (aq) ,| , Ag (s). Given E^ _ Cu^ 2+ /Cu =+0.34 V, E^ _ Ag^+/Ag...
- Standard electrode potential of the cell H_2 ,| ,H^+ ,|| ,Ag^+ ,| ,Ag is
- If the standard electrode potential of the Cu^ 2+ /Cu electrode is 0.34 V, what is the electrode potential at 0.01 M...
- The standard reduction potential of the reaction H_2O +e^- 1 2 H_2 + OH^- at 298 K is
- I. Cu +2 HCl CuCl_2 + H_2 (g) [E^ _ Cu^ 2+ /Cu =+0.34 V] II. Zn +2 HCl ZnCl_2 + H_2 (g) [E^ _ Zn^ 2+ /Zn =-0.76 V] III. Ag +2 HCl...
- The cell reaction of the galvanic cell Cu (s) ,| , Cu^ 2+ (aq) ,|| , Hg^ 2+ (aq) ,| , Hg (l) is
- The standard emf for the cell reaction 2 Cu^+ (aq) Cu (s)+ Cu^ 2+ (aq) is +0.36 V at 298 K. The equilibrium constant of the...
- EMF of the hydrogen electrode in terms of pH is (at 1 atm pressure)
- The standard reduction potentials of Zn and Ag in water at 298 K are, Zn^ 2+ +2e^- Zn ; E^ =-0.76 V, and Ag^+ +e^- Ag ; E^ =+0.80...
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