InterviewSolution
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InterviewSolution
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Iron and nickel are used to make an electrochemical cell by using slat bridge to join a half-cell containing 1.0 M solution of `Fe^(2+)(aq)` in which a strip of iron has been immersed to a second half-cell which contains 1.0 M `Ni^(2+)(aq)` solution in which a strip of nickel has been immersed. A voltmeter is connected between the two metal strips. (i) In which cell does reduction occurs? (ii) Write the half-cell reactions involved. (iii) Which metal is the anode? (iv) In which direction are the electrons passing through the voltmeter? (v) What would be effect ont he voltmeter reading if `Fe^(2+)` concentration were increased? (vi) What will be the voltmeter readind when the cell reaches equilbirium? Given that the standard electrode potential of `Fe^(2+)//Fe and Ni^(2+)//Ni` electrodes are -0.44 and -0.25 volt respectively. |
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Answer» Correct Answer - (i) Nickel half cell (ii) `Ni^(2+)+2e^(-)toNi` (iii) Fe is anode (iv) Iron to nickel (v) Voltmeter reading decreases (vi) V=0 |
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