Electrochemistry questions
1808 published questions with worked solutions.
- The standard oxidation potential of the Ni/Ni^ 2+ ( Ni^ 2+ =1 ,M) electrode is 0.236 V. If this is combined with a hydrogen...
- 9650 C of charge is passed through an aqueous solution of a metal nitrate M( NO_3 )_x to obtain 2 g of metal (at. wt. 80). The...
- In the rusting of iron, iron is oxidised and O_2 is reduced. The number of electrons used during the reduction of one molecule of...
- The equivalents of metal discharged when 482.5 ampere is passed through its aqueous salt solution for 800 seconds is
- E^ for a cell having 2 electrons involved in the redox change is 0.2655 V. The equilibrium constant for the redox change is 10^a....
- The concentration (in molarity) of Ni(NO_3)_2 left after passing a 965 ampere current for one second through a 2 M Ni(NO_3)_2...
- E^ (in volt) of the cell A+B^ n+ A^ n+ +B (taking n=2, consistent with the given A^ 2+ /A couple) if E^ _ A^ 2+ /A =-2.5 V and E^...
- The conductance of a 0.0015 M aqueous solution of a weak monobasic acid was determined using a conductivity cell of platinised Pt...
- Resistance of a 0.4 M solution of an electrolyte is 100 . The specific conductance of the solution is 1.5 S ,m^ -1 . The...
- Two electrolytic cells containing molten solutions of calcium chloride and aluminium chloride are connected in series. If the...
- At 298 K, the e.m.f. of the electrochemical cell Zn (s)| Zn^ 2+ (0.1 ,M)|| Cu^ 2+ (0.01 ,M)| Cu (s) will be ________ V. (Given E^...
- The standard electrode potential of Ag^+/Ag is +0.80 V and the standard potential of the cell represented by the reaction 2 Ag^+...
- 5.79 10^5 C of electricity passed through an electrolyte deposited 54 g of metal (atomic mass = 27 g mol^ -1 ). The charge on the...
- Electrode potential for the Ag electrode varies according to the equation E_ Ag^+/Ag =E^ _ Ag^+/Ag - 0.059 1 1 [ Ag^+ ] . If the...
- At a certain temperature, the ratio of equivalent conductance to specific conductance of a 0.1 N NaCl solution is 10^X cm^3 ,eq^...
- When a current of 1.0 A is passed for 10 hours through a molten metal salt, it deposits 12.2 g of metal (at. wt. = 65.4 u). The...
- How many of the following can displace copper from its salt solution? Zn, Fe, Pb, Ni, Ag, Au
- The standard reduction potentials E^ for the half-reactions are: Al^ 3+ +3e^- Al (s), E^ =-1.66 V; Cu^ 2+ +2e^- Cu (s), E^ =0.34...
- What would be the electrode potential (in volts) of Zn^ 2+ |Zn in which the activity of zinc ions is 0.01 M? (Given E^ _ Zn^ 2+...
- If a standard Zn^ 2+ /Zn electrode is diluted 10 times, then the cell e.m.f. is increased by ________ V.
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