Electrochemistry questions
1808 published questions with worked solutions.
- If standard reduction potential (E^0) of (Ni^ +2 _ (aq) | Ni_ (s) ) and (Al^ +3 _ (aq) | Al_ (s) ) are -0.25 V and -1.66 V...
- If E^0(M^ +2 _ (aq) | Mg_ (s) ) = -2.37 V. What is potential for Mg_ (s) M^ +2 _g (0.01 M) + 2 e at 298 K?
- Which from following statements is true regarding the cell emf at 298 K for Ni_ (s) ,| ,Ni^ +2 (0.01 ,M) ,|| ,Ag^ + (0.01 ,M) ,|...
- Which from following is nonconductor of electricity?
- The standard emf for cell, Cd_ (s) ,| ,Cd^ +2 (1 ,M) ,|| ,Cu^ +2 (1 ,M) ,| ,Cu_ (s) is 0.74 V. If concentration of Cd^ +2 _ (aq)...
- A hypothetical galvanic cell is A_ (s) ,| ,A^ + (1 ,M) ,|| ,B^ +2 (1 ,M) ,| ,B_ (s) and emf of cell is positive. What is the...
- What is value of E_ cell at 298 K for the reaction, Zn_ (s) + Cu^ +2 (0.1 M ) Zn^ +2 (0.1 M ) + Cu_ (s) if E^0_ cell = 1.1 V?
- Consider galvanic cell, A_ (s) A^ +2 _ (aq) B^ + _ (aq) B_ (s) if emf of cell is positive, identify a correct cell reaction from...
- Standard potential of electrode reaction Cu^ +2 _ (aq) + 2 e Cu_ (s) is +0.34 V. What is standard potential of reaction 2Cu_ (s)...
- What is molar conductivity at zero concentration in ^ -1 cm^2 ,mol^ -1 for aluminium sulphate, if molar ionic conductivities at...
- What is the charge required to convert 2 mol KMnO_4 to MnSO_4?
- If standard reduction potential (E^0) of (Mg^ +2 _ (aq) | Mg_ (s) ), (Ag^ +2 _ (aq) | Ag_ (s) ), (Zn^ +2 _ (aq) |Zn_ (s) ) and...
- If E^0 ,(Zn^ +2 _ (aq) ,| ,Zn_ (s) ) = -0.76 V. Calculate potential for Zn_ (s) Zn^ +2 _ (0.01M) + 2 e at 298 K?
- Which of the following net cell reaction takes place in a galvanic cell containing copper electrode and standard hydrogen...
- What is reduction potential of hydrogen gas is at 1 atmospheric pressure and platinum electrode is in contact with HCl solution...
- What happens to the emf for the cell, Zn_ (s) |Zn^ +2 (1M) |Ag^ +1 (1 M)|Ag_ (s) if concentration of Ag^ +1 decreases to 0.1 M?
- For the cell reaction, A_ (s) + B^ +2 _ (aq) A^ +2 _ (aq) + B_ (s) if equilibrium constant of reaction is 10^4 at 298 K. What is...
- If E^0 ( Cu^ +2 _ (aq) ,| , Cu_ (s) ) = +0.34 V. What is potential for Cu_ (s) Cu^ +2 _ (aq) (0.1 M) + 2e^- at 298 K?
- What is present dissociation of NH_4OH if molar conductance at zero concentration for NH_4Cl, NaCl and NaOH are 130, 109 and 213...
- A battery is constructed of Cr and Na_2Cr_2O_7. The unbalanced chemical equation when such a battery discharges is following:...
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