Electrochemistry questions
1808 published questions with worked solutions.
- The standard potentials of Ag^+/Ag, Hg_2^ 2+ /2Hg, Cu^ 2+ /Cu and Mg^ 2+ /Mg electrodes are 0.80, 0.79, 0.34 and −2.37 V,...
- Given E^ _ Cu^ 2+ /Cu = 0.34 V, E^ _ Cu^ 2+ /Cu = 0.15 V Standard electrode potential for the half cell Cu^+/Cu is
- The standard reduction potentials for Zn^ 2+ /Zn, Ni^ 2+ /Ni, and Fe^ 2+ /Fe are −0.76, −0.23 and −0.44 V respectively. The...
- The migration of dispersion medium under the influence of an electric potential is called :
- Given : E^ _ 12Cl_2/Cl^- = 1.36 V, E^ _ Cr^ 3+ /Cr = -0.74 V, E^ _ Cr_2O_7^ 2- /Cr^ 3+ = 1.33 V, E^ _ MnO_4^-/Mn^ 2+ = 1.51 V....
- The Gibbs energy for the decomposition of Al_2O_3 at 500 C is as follows : 23Al_2O_3 43Al + O_2, _rG = +940 kJ mol^ -1 The...
- A solution of copper sulphate (CuSO_4) is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited...
- A current of 10.0 A flows for 2.00 h through an electrolytic cell containing a molten salt of metal X. This results in the...
- The standard electrode potentials (E^ _ M^+/M ) of four metals A, B, C and D are −1.2 V, 0.6 V, 0.85 V and −0.76 V, respectively....
- The gas liberated by the electrolysis of Dipotassium succinate solution is:
- Given Fe^ 3+ (aq) + e^- Fe^ 2+ (aq); E^0 = +0.77 V ; Al^ 3+ (aq) + 3e^- Al(s); E^0 = -1.66 V ; Br_2(aq) + 2e^- 2Br^-; E^0 = +1.09...
- How many electrons would be required to deposit 6.35 g of copper at the cathode during the electrolysis of an aqueous solution of...
- Copper becomes green when exposed to moist air for a long period. This is due to:
- At 300 K , the molar conductivities of the aqueous solutions of three salts at two different concentrations are given below: |...
- A solution of copper sulphate is electrolysed for 10 minutes with a current of 1.5 amperes. The mass of copper deposited at...
- Calculate emf of the half cell given below : Pt(s) | H_2(g, 2 atm) | HCl(aq, 0.02 M) E^ _ H_2/H^+ = 0 V (Given: 2.303RT F =...
- The standard electrode potential (E^ ) for the half-cell reaction Fe^ 3+ + e^- Fe^ 2+ at 298 K is (Given : E^ (Fe^ 3+ /Fe) =...
- For a salt XY, which is a strong electrolyte, the plot of _m versus c has a slope of -90.0 S cm ^2 mol ^ -3/2 L ^ 1/2 at 298 K....
- Two Faraday of electricity is passed through a solution of CuSO_4. The mass of copper deposited at the cathode is: (Atomic mass...
- A variable, the opposite external potential ( E _ ext ) is applied to the cell Zn ,| , Zn ^ 2+ ,(1 M ) , | , Cu ^ 2+ ,(1 , M ) ,|...
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