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Standard XII
Chemistry
Galvanic Cells
Question

A standard electrochemical cell is made by dipping an Ag electrode into a $$1.0$$M $$Ag^+$$ solution and a Cd electrode into a $$1.0$$M $$Cd^{2+}$$ solution.
See $$E^0$$ values from the table if required.
What would be the effect on the potential of the cell if the size of the silver electrode was doubled?

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Similar Questions
Q1
A standard electrochemical cell is made by dipping an Ag electrode into a $$1.0$$M $$Ag^+$$ solution and a Cd electrode into a $$1.0$$M $$Cd^{2+}$$ solution.
See $$E^0$$ values from the table if required.
What would be the effect on the potential of the cell if the size of the silver electrode was doubled?
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Q2
A standard electrochemical cell is made by dipping an Ag electrode into a $$1.0$$M $$Ag^+$$ solution and a Cd electrode into a $$1.0$$M $$Cd^{2+}$$ solution.
See $$E^0$$ values from the table if required.
What would be the effect on the potential of this cell if $$Na_2S$$ were added to the $$Cd^{2+}$$ half cell and CdS were precipitated? Why?
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Q3
Consider the reaction,
2Ag++Cd→2Ag+Cd2+
The standard electrode potentials for Ag+→Ag and Cd2+→Cd couples are 0.80 volt and −0.40 volt respectively.
(i) What is the standard potential E∘ for this reaction?
(ii) For the electrochemical cell, in which this reaction takes place which electrode is negative electrode?
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Q4
An electrode is prepared by dipping an Ag strip into a solution saturated with silver thiocyanate, $$AgSCN$$, and containing $$0.10$$M $$SCN^-$$. The emf of the voltaic cell constructed by connecting this electrode as the cathode to the standard hydrogen half cell as the anode is $$0.45$$V. What is $$K_{sp}$$ of $$AgSCN$$?
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Q5
A galvanic cell consists of a strip of cobalt metal dipping into 1.0 M Co2+ ions, and another half cell in which a piece of platinum dips into a 1.0 M solution of Cl− ions. Now Cl2(g) at a pressure of 1.0 atm is passed into this solution. The observed cell voltage is 1.63 V, and as the cell reaction proceeds, the Co electrode becomes negative.
E⊖(1/2Cl2+e−→Cl⊖)=1.36V. The E⊖ of cobalt electrode is:
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