Electrochemistry questions
1808 published questions with worked solutions.
- For the disproportionation reaction 2Cu^+(aq) Cu(s)+Cu^ 2+ (aq) at 298 K, ln K (where K is the equilibrium constant) is _____ 10^...
- How can an electrochemical cell be converted into an electrolytic cell?
- Let C_ NaCl and C_ BaSO_4 be the conductances (in S) measured for saturated aqueous solutions of NaCl and BaSO_4 , respectively,...
- The photoelectric current from Na (work function, w_0 = 2.3 eV) is stopped by the output voltage of the cell Pt(s) | H_2 (g, 1...
- The emf of cell Tl|Tl⁺(0.001 M)||Cu²⁺(0.01 M)|Cu is 0.83 V at 298 K. It could be increased by:
- The reaction: ½H₂(g) + AgCl(s) → H⁺(aq) + Cl⁻(aq) + Ag(s) occurs in which of the following galvanic cell:
- 250 mL of a waste solution obtained from the workshop of a goldsmith contains 0.1 M AgNO_3 and 0.1 M AuCl. The solution was...
- an oxidation-reduction reaction in which 3 electrons are transferred has a G^0 of 17.37 kJ mol ^ -1 at 25°C. The value of E_ cell...
- Potassium chlorate is prepared by the electrolysis of KCl in basic solution 6OH^-+Cl^- ClO_3^-+3H_2O+6e^- . If only 60% of the...
- For the given cell ; Cu(s)|Cu^ 2+ (C_1M)||Cu^ 2+ (C_2M)|Cu(s) change in Gibbs energy ( G) is negative, if :
- Match List I with List II. List-I: (Conversion) (A) 1 mol of H_2O to O_2 (B) 1 mol of MnO_4^- to Mn^ 2+ (C) 1.5 mol of Ca from...
- The E^ value for the Mn^ 3+ /Mn^ 2+ couple is more positive than that of Cr^ 3+ /Cr^ 2+ or Fe^ 3+ /Fe^ 2+ due to change of
- Mass in grams of copper deposited by passing 9.6487 A current through a voltmeter containing copper sulphate solution for 100...
- On electrolysis of dil.sulphuric acid using Platinum (Pt) electrode, the product obtained at anode will be :
- The number of Faradays (F) required to produce 20 g of calcium from molten CaCl_2 (Atomic mass of Ca = 40 g mol^ -1 ) is :
- At 298 K, the standard electrode potentials of Cu^ 2+ /Cu, Zn^ 2+ /Zn, Fe^ 2+ /Fe and Ag^ + /Ag are 0.34 V, -0.76 V, -0.44 V and...
- Given below are half cell reactions: MnO _4^ - +8 H ^ + +5e^ - Mn ^ 2+ +4 H _2 O , E^ _ Mn ^ 2+ / MnO _4^- =-1.510 V 12 O _2+2 H...
- Find the emf of the cell in which the following reaction takes place at 298 K Ni (s)+2 Ag ^ + (0.001 M ) Ni ^ 2+ (0.001 M )+2 Ag...
- Consider the following two half-cell reactions along with the standard reduction potential given: CO₂ + 6H⁺ + 6e⁻ → CH₃OH + H₂O,...
- An electrochemical cell is constructed using half cells in the direction of spontaneous change: Fe(OH)₂(s) + 2e⁻ → Fe(s) +...
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