In the following spontaneous voltaic cell, which of the following statements are TRUE? Select as many answers as are correct however points will be deducted for incorrect guesses.Pt(s)|H2(g)|H+(aq)|| Ag(s)|Ag+(aq)Question 2Select one or more:Eºcell is negativeSHE is the anodeAg+/Ag is the anodeAg+/Ag is the cathodeSHE is the cathodeEºcell is positive
Question
In the following spontaneous voltaic cell, which of the following statements are TRUE? Select as many answers as are correct however points will be deducted for incorrect guesses.Pt(s)|H2(g)|H+(aq)|| Ag(s)|Ag+(aq)Question 2Select one or more:Eºcell is negativeSHE is the anodeAg+/Ag is the anodeAg+/Ag is the cathodeSHE is the cathodeEºcell is positive
Solution
In a spontaneous voltaic cell, the anode is the site of oxidation and the cathode is the site of reduction.
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Eºcell is negative: This statement is FALSE. In a spontaneous voltaic cell, the Eºcell (standard cell potential) is positive.
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SHE is the anode: This statement is TRUE. The Standard Hydrogen Electrode (SHE) is usually taken as the anode where oxidation occurs. In this case, H2 is getting oxidized to H+.
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Ag+/Ag is the anode: This statement is FALSE. In this cell, Ag+/Ag is the cathode where reduction is taking place. Ag+ is getting reduced to Ag.
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Ag+/Ag is the cathode: This statement is TRUE. As mentioned above, Ag+/Ag is the site of reduction and hence, it is the cathode.
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SHE is the cathode: This statement is FALSE. SHE is the anode in this cell, not the cathode.
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Eºcell is positive: This statement is TRUE. For a spontaneous reaction, the Eºcell is positive.
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