electrochemistry

Related Questions

• Consider certain observations about electrolysisI : Electric current is used to drive a non-spontaneous reactionII : Ecell is positive and is negativeIII : Cations and anions are discharged at the cathode and anode respectivelyIV : Over-voltage is responsible that a particular reaction takes place. Correct observations are :

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• ${{E}^{0}}$ for the cell $Zn|Z{{n}^{2+}}(aq)||C{{u}^{2+}}(aq)|Cu$ is 1.10 V at ${{25}^{o}}C$, the equilibrium constant for the reaction $Zn+C{{u}^{2+}}(aq)$ ? $Cu+Z{{n}^{2+}}(aq)$ is of the order of

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• The emf of the cell in which the following reaction $Zn(s)+N{{i}^{2+}}(a=1.0)$? $Z{{n}^{2+}}(a=10)+Ni\,(s)$ occurs, is found to be 0.5105 V at 298K. The standard emf of the cell is

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• After the electrolysis a sodium chloride solution with inert electrodes for a certain period of time, 600 mL of a 1 N $NaOH$ solution was left. During the same time 31.80 g $Cu$ was deposited in a copper voltameter in series with the electrolytic cell. Calculate the percentage of $NaOH$ obtained (atomic weight of $Cu = 63.6$)

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• Consider the following statements about a Galvanic cell I : Electrons flow through ${{H}_{2}}O$ (medium) from anode to cathode II : Electrons flow through wire from anode to cathode III : Salt bridge is necessary to complete the electrical circuit Select correct alternate (s)

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