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.
134 Views
72.What is the efficiency of fuel cell? What is the use of fuel cell?
136 Views
73.Write the correct representation of cell: 2Cr(s) + 3Cd2+ (aq) → 2Cr3+ (aq) + 3Cd(s)
281 Views
74.What is the relationship between equivalent conductance and specific conductance?
75.What is the role of the salt bridge in a voltaic cell?
Answer:
A salt bridge allows the flow of ions to maintain a balance in charge between the oxidation and reduction vessels while keeping the contents of each separate. With the charge difference balanced, electrons can flow once again, and the reduction and oxidation reactions can proceed.
115 Views
Advertisement
76.What is the effect of dilution on equivalent conductance of solution?
124 Views
77.How is molar conductivity is related to molarity of electrolyte solutions?
130 Views
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?
117 Views
Advertisement
79.Why is not possible to determine for weak electrolytes by extrapolation?
275 Views
80.What is the use of platinum foil in the hydrogen electrode?
Short Answer Type
Switch
