During an electrolysis experiment, the following species are present in solution: H+, CH3COOH, CH3COO-, Na+, SO42-, H2O. The lead electrode dipped in the solution serves as the anode. Na+ and SO42- are neither oxidized or reduced during the electrolysis. Why is Na2SO4 still added to the solution?     Oxidation reactions are only possible in the presence of Na+ and SO42- ions.     Reduction reactions are only possible in the presence of Na+ and SO42- ions.     An electrolysis process becomes spontaneous when a strong electrolyte like Na2SO4 is present.     Na2SO4 serves as a conducting medium.

Element A has a standard reduction potential of +0.74V, whereas Element B has a standard reduction potential of -1.15V. Which of the following statements is correct with respect to building a Galvanic cell with these two elements? A. A will be the cathode, B will be the anode, and the cell potential will be positive. B. A will be the cathode, B will be the anode, and the cell potential will be negative. C. A will be the anode, B will be the cathode, and the cell potential will be positive. D. A will be the anode, B will be the cathode, and the cell potential will be negative. E. The anode, cathode, and cell potential must all be experimentally determined.

A certain half-reaction has a standard reduction potential E=+1.34 V. An engineer proposes using this half-reaction at the anode of a galvanic cell that must provide at least 1.20 V of electrical power. The cell will operate under standard conditions. Note for advanced students: assume the engineer reguires this half-reaction to happen at the anode of the cell. nh Data Half-Reaction E° (V) 0.7996 Is there a minimum standard reduction potential that the half-reaction used at the cathode of this cell can have? = Ov Ag+ (aq) + e- -→ Ag (s) O yes, there is a minimum. E %3D red Al3+ (aq) + 3e- → Al (s) -1.676 1.692 Au+ (aq) + e → Au (s) If so, check the "yes" box and calculate the minimum. Round your answer to 2 decimal places. If there is no lower limit, check the "no" box. O no minimum Au3+ (aq) + 3e- → Au (s) 1.498 Ba2+ (ag) + 2e- - Ba (s) -2.912 Brz (1) + 2e 2Br (aq) 1.066 - Ca2+ (ag) + 2e Ca (s) -2.868 Is there a maximum standard reduction potential that the half-reaction used at the…

Set up a cell that has a Mg electrode in a 1.0 M aqueous Mg²+ solution on the left side and a Cu electrode in a 1.0 M aqueous Cu2+ solution on the right side. Add the salt bridge. What is the anode of this system? the Cu electrode the Mg electrode What is the cathode of this system? the Cu electrode O the Mg electrode