Question

Q.35 Calculate e.m.f. of the following cell Zn(s)/ Zn2+ (0.1M) || (0.01 M) Ag+/ Ag(s)
Given Eºzn2+/zn = -0.76 V
EºAg+/Ag = +0.80V
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Answer 1

Explanation:

2+ 6) Zn + AgZn2+ + Ag a) Write the cell according to the accepted notation for a voltaic cell, including the polarity of the electrodes, phase boundaries, salt bridge. b) Write the anode, cathode and total reactions, balance the reaction and calculate the total cell potential. c) If the enthalpy of the reaction at 25°C is, AH°2 = 51820 cal/mol, find the values of AG°2 298 298 and AS°298. d) Decide whether the reaction is spontaneous or not at standart conditions. e) If Zn metal is immersed in the solution containing Agions and it is electrolyzed by applying 1 A for 3 hours, how many grams of Ag are coated? EⓇZn2+/Zn = -0.763 V, EºAg+/Ag = 0.80 V, Mag= 107 g/mol