Chemistry questions
29404 published questions with worked solutions.
- At 25^ temperature, the cell potential of a given electrochemical cell is 1.92 V. Mg(s)|Mg^ 2+ (aq, x M) , | ,Fe^ 2+ (aq, 0.01...
- For the following cell reaction, Ag|Ag^+|AgCl|Cl^-|Cl_2, Pt G^ _f( AgCl ) = -109 kJ/mol; G^ _f( Cl^- ) = -129 kJ/mol G^ _f( Ag^+...
- Two concentration cells of Ag with Ag electrode in AgNO_3 . In first cell, concentration of one electrode is 1M and other...
- The zinc/silver oxide cell is used in electric watches. Zn Zn^ 2+ + 2e^- ; E^ = 0.76 V Ag_2O + H_2O + 2e^- 2Ag + 2OH^- ; E^ =...
- E_1, E_2 and E_3 are the emf of the following three galvanic cells, respectively (i) Zn(s)|Zn^ 2+ (0.1M) , | ,Cu^ 2+ (1M)|Cu(s)...
- Small quantities of solutions of compounds TX, TY and TZ are put into separate test tubes containing X, Y and Z solutions. TX...
- E^ _ Fe^ 3+ /Fe = -0.036 V, E^ _ Fe^ 2+ /Fe = -0.439 V. The value of standard electrode potential for the change, Fe^ 3+ (aq) +...
- An alloy of Pb-Ag weighing 1.08 g was dissolved in dilute HNO_3 and the volume made to 100 mL. A silver electrode was dipped in...
- 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...
- The standard emf of a galvanic cell reaction with n = 2 is found to be 0.295 V at 25^ . The equilibrium constant of the reaction...
- The standard reduction potentials of Zn^ 2+ |Zn , Cu^ 2+ |Cu and Ag^+ ,| ,Ag are respectively -0.76, 0.34 and 0.8 V. The...
- The Edison storage cell is represented as Fe(s)|FeO(s)|KOH(aq)|Ni_2O_3(s)|NiO(s) ,| ,Ni(s) The half-cell reactions are Ni_2O_3(s)...
- Which one of the following metal protect the iron better after having the cracks?
- Standard electrode potential data are useful for understanding the suitability of an oxidant in a redox titration. Some half-cell...
- Zn|Zn^ 2+ (a = 0.1 M) , | ,Fe^ 2+ (a = 0.01 M)|Fe . The emf of the above cell is 0.2905 V. Equilibrium constant for the cell...
- Calculate the equilibrium constant log(K_c) for the reaction Zn(s) + Cu^ 2+ (aq) Zn^ 2+ (aq) + Cu(s) [Given, E^ _ cell = 1.1 V]
- Match the terms given in Column I with the items given in Column II and choose the correct option from the codes given below....
- The cell, Zn ,|Zn^ 2+ (1M) |Cu^ 2+ (1 M) ,|Cu E^ _ cell = 1.10 V was allowed to be completely discharged at 298 K. The relative...
- Using the standard electrode potential, find out the pair between which redox reaction is not feasible. E^ values: Fe^ 3+ /Fe^ 2+...
- Calculate the potential corresponding to the following cell. Pt ,| ,Co^ 2+ (2.0 M), Co^ 3+ (0.01 M) , | ,Cr_2O_7^ 2- (4.0 M), Cr^...