1332 practice test 3

1332 practice test 3 - FIRST 4 QUESTIONS ARE BASED ON NEW...

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FIRST 4 QUESTIONS ARE BASED ON NEW STUFF. ONLY NUMBER 1 MIGHT BE ON EXAM 1. Given the values of Eº red given below, calculate the value of ΔGº at 25 ºC for the reaction, Co(s) | Co 2+ || Br 2 (l) | 2 Br - (aq) Br 2 + 2 e - 2 Br(aq) Eº red = 1.07 V Co 2+ (aq) + 2 e - Co(s) Eº red = -0.28 V (A) -76.2 kJ (B) -130 kJ (C) -152 kJ (D) -261 kJ (E) 152 kJ 2. Given the values of Eº red given below, calculate the value of E at 25 ºC for the cell based on the reaction, Co(s) + Sn 2+ (aq) Co 2+ (aq) + Sn(s) when the [Sn 2+ ] = 0.15 M and [Co 2+ ] = 0.50 M. Sn 2+ (aq) + 2 e - Sn(s) red = -0.14 V Co 2+ (aq) + 2 e - Co(s) red = -0.28 V (A) 0.125 (B) 0.140 (C) 0.156 (D) 0.405 (E) 0.435 3. If CaCl 2 (aq) is electrolyzed using inert electrodes, (A) H 2 (g) is produced at the cathode and Cl 2 (g) at the anode. (B) Cl 2 (g) is produced at the cathode and H 2 (g) at the anode. (C) H 2 (g) is produced at the cathode and O 2 (g) at the anode. (D) Ca(s) is produced at the cathode and Cl 2 (g) at the anode. (E) Cl 2 (g) is produced at the cathode and Ca(s) at the anode. 4. How many grams of nickel will be plated out of a solution that contains Ni 2+ ion by a 0.25-A current in 37 minutes? (A) 0.0028 g (B) 0.11 g (C) 0.17 g (D) 0.33 g (E) Nickel cannot be plated out NOW HERE IS THE EXAM PRACTICE STUFF 1. Which of the following mixtures would be classified as a buffer solution? (A)
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1332 practice test 3 - FIRST 4 QUESTIONS ARE BASED ON NEW...

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