Electrochemistry questions
1808 published questions with worked solutions.
- The e.m.f. of a cell involving the cell reaction H_2 + 2Ag^+ → 2H^+ + 2Ag is 0.80 V. The standard reduction potential of Ag^+ |...
- The cell potential of the galvanic cell Zn | Zn^ ++ | Ag^+ | Ag ; E^ (Zn^ ++ | Zn) = -0.76 V, E^ (Ag^+ | Ag) = +0.80 V
- The half cell reaction of the cell used in hearing aids are Zn → Zn^ 2+ + 2e^- (E^ = +0.76 V) Ag_2O + H_2O + 2e^- → 2Ag + 2OH^-...
- E^ values of Mg/Mg^ +2 is +2.37 V, of Zn/Zn^ +2 is +0.76 V and that of Fe/Fe^ +2 is +0.44 V, which of the following statements is...
- A solution containing one mole per litre each of Cu(NO_3)_2, AgNO_3, Hg_2(NO_3)_2 and Mg(NO_3)_2, is electrolyzed using inert...
- The SRP values of three elements A, B and C are +2.37 V, -1.85 V and -1.36 V respectively. So the order of their reducing power...
- Will tin displace lead from an aqueous solution of lead bromide?
- More electropositive elements have more
- On the electrolysis for aqueous solution of sodium sulphate, on cathode we get
- Can spontaneous reactions occur between Zn^ 2+ and Au atoms? (E^ _ ox Values for zinc and gold are +0.76 V and -1.42 V resp.)
- E^ Cu/Cu^ +2 = +0.34 V, E^ Sn/Sn^ +2 = -0.14 V, E^ Zn/Zn^ 2+ = -0.76 V. Predict spontaneous reaction.
- E^ Cu/Cu^ +2 = +0.34 V, E^ Sn/Sn^ +2 = -0.14 V, E^ Zn/Zn^ 2+ = -0.76 V. Predict spontaneous reaction.
- Prevention of corrosion on iron by Zn coating is called
- Is the reaction 2Al + 3Fe^ 2+ → 2Al^ 3+ + 3Fe possible?
- Zinc is used to protect corrosion of iron because
- Arrange the following metals in the increasing order of reducing power: Li, Zn, Sn, Fe, Cu, Ag. E^ _ Li = -3.045 V, E^ _ Zn =...
- Which of the following pairs of metal cannot be obtained by electrolysis of an aqueous solution of its salt?
- Given that E^ (Zn) = -0.76 V and E^ (Cu) = 0.34 V. Calculate the emf of the cell with cell reaction Zn + Cu^ 2+ → Cu + Zn^ 2+ .
- The reaction is spontaneous if the cell potential is
- What metal will dissolve in the galvanic cell represented as : Cu | Cu^ 2+ || Ag^+ | Ag?
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