Question

2. The equilibrium constant for the dissociation of Ag,CO, (s) + 2 Ag+ + CO, is Kp -8.1 10-12 at 25°C. a) Calculate AG for the reaction when [Ag'] = 1.0 x 10 2M and CO, +1 = 1.0 x 10- M. (4pts) Ans: b) (Ipt) Is the reaction spontaneous or nonspontaneous at these concentrations? Ans: 3. (4pts) Nitrosyl chloride (NOCI) decomposes at elevated temperatures according to the equation below; 2NOCI(g) 2NO(g) + Cl2(g) Calculate K, for this reaction at 227°C. (AH° = 81.2 kJ/mol, AS° = 128 J/K mol) Ans: 4. (4pts) Complete and balance the following redox reaction under acidic conditions: MnO4 (aq) + C,0.2(aq) + Mn?" (aq) + CO2(aq) (Write clearlyl Especially your final answerst) Ans: 5. How many grams of nickel would be electroplated by passing a constant current of 7.2 A through a solution of Niso, for 90.0 min? (4pts) Ans: 6. What current is needed to deposit 0.500 g of chromium metal from a solution of Cre in a period of 1.00 hr? (4pts) Ans: 7. Consider a galvanic cell which has an Iron electrode submerged in a Fe(NO3), soln. and a Gold electrode submerged in a Au(NO3)3 soln. a) Find the Ecent of this cell under standard conditions: (2pts) Au + 3e Aus) ER = 1.50 V +2e=Fe ER= -0.44 V Ans: Fe b) Write out the balanced net reaction of this cell? (3pts) c) What is the cell potential if the concentration of the Iron ions is 1.50 M and the Gold ions is 0.00400 M? (4pts) Ans: