Given the standard electrode potentials: K+/K = – 2.93 V Ag+/Ag = 0.80V Hg2+/Hg = 0.79 V Mg2+/Mg = –2.37 V Cr3+/Cr = –0.74 V. Arrange these metals in their increasing order of reducing power.
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72.What is the efficiency of fuel cell? What is the use of fuel cell?
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73.Write the correct representation of cell: 2Cr(s) + 3Cd2+ (aq) → 2Cr3+ (aq) + 3Cd(s)
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74.What is the relationship between equivalent conductance and specific conductance?
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75.What is the role of the salt bridge in a voltaic cell?
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76.What is the effect of dilution on equivalent conductance of solution?
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77.How is molar conductivity is related to molarity of electrolyte solutions?
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78.For the electrochemical reaction: Zn2+(aq) + Cu(s) → Zn(s) + Cu2+(aq) [E°cell = – 1.10 V] What does the negative value of E°cell indicate?
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79.Why is not possible to determine for weak electrolytes by extrapolation?
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