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Redox Reaction

Q. Electrolysis is performed on a mixture of CuBr(l), AgBr(l), MgBr2(l), and NiBr2(l). Which of the following is produced at the cathode? a) Br2(l) b) Cu(s) c) Ag(s) d) Mg(s) e) Ni(s)

Solved • Mar 7, 2020

Redox Reaction

Q. An old iron beam was coated with an unknown metal. There is a crack on the coating and it is observed that the iron is rustling at the fracture. The beam is in a structure that experiences high stress, resulting in frequent fractures to the coating. What was the old metal coating likely made of and what metal you would use to repair the fractures to avoid further corrosion? Drag each label to the appropriate target.

Solved • Mar 7, 2020

Redox Reaction

Q. What substance is produced at the cathode during the electrolysis of molten calcium bromide, CaBr2? Assume standard conditions. Express your answer as a chemical formula.

Solved • Mar 7, 2020

Redox Reaction

Q. Assume that you want to construct a voltaic cell that uses the following half reactions: A^2+(aq) + 2 e^- → A (s) E°red = -0.10V B^2+(aq) + 2 e^- → B (s) E°red = -1.06V You begin with the incomplete cell pictured below, in Which direction do electrons move through the external circuit? a) from A to B b) from B to A

Solved • Mar 5, 2020

Redox Reaction

Q. Arrange the following in order of decreasing strength as reducing agents in acidic solution: Zn, I^-, Sn^2+, H2O2, Al. Rank from strongest to weakest. To rank items as equivalent, overlap them.

Solved • Mar 5, 2020

Redox Reaction

Q. Assuming standard conditions, arrange the following in order of decreasing strength as oxidizing agents in acidic solution: Cr2O7^2-, H2O2, Cu2+, Cl2, O2. Rank from strongest to weakest. To rank items as equivalent, overlap them.

Solved • Mar 5, 2020

Redox Reaction

Q. Potassium permanganate, KMnO4, is a powerful oxidizing agent. The products of a given redox reaction with the permanganate ion depend on the reaction condition used. In basic solution, the following equation represents the reaction of this ion with a solution containing sodium fluoride: MnO4^-(aq) + F^-(aq) → MnO2(s) + F2(aq) Since this reaction takes place in basic solution, H2O(l) and OH^-(aq) will be shown in the reaction. Places for these species are indicated by the blanks in the following restatement of the equation: MnO4^-(aq) + F^-(aq) + ___ → MnO2(s) + F2(aq) + ___ What are the coefficients of the reactants and products in the balanced equation above? Remember to include H2O(l) and OH^-(aq) in the blanks where appropriate. Your answer should have six terms. Enter the equation coefficients in order separated by commas (e.g., 2, 2, 1, 4, 4, 3). Include coefficients of 1, as required, for grading

Solved • Mar 4, 2020