16.a. During the curing of a battery plate, which of the following takes place? A. The active material dries and becomes hard. B. Problems in the plate are corrected. C. The active material is converted to lead oxide. D. The active material is converted to the charged state. 16.b. During the recharge of a lead-acid battery, which of the following takes place? A. The negative plate is oxidized to lead sponge. B. Sulfuric acid is produced. C. The positive plate is reduced to lead sulfate. D. The electrolyte becomes weaker or less concentrated.

A zinc bar weighing 3.0 kg is attached to a buried iron pipe to protect the pipe from corrosion. An average current of 0.020 A flows between the bar and the pipe. How many years will be required for the zinc bar to be entirely consumed? a. 600yrs b. 7.00yrs c. 5.99yrs d. 14.0yrs

During electrolysis of copper sulfate solution, the Cu2+ ions are reduced at the _____. a.anode b.cathode c.salt bridge d.catholyte solution

Many mechanics recommend a protective oil layer be applied to your car before the winter season.  This is done to prevent the car from rusting. a. Distinguish between the terms 'rusting' and 'corrosion'. b. Why might the risk of rusting increase in the winter? Explain.

In a cell with Zn/Zn2+ and Cu/Cu2+ electrodes, _______.   a. Cu is oxidized and Zn2+ is reduced.   b. Cu is reduced and Zn2+ is oxidized.   c. Cu2+is oxidized and Zn is reduced.   d. Cu2+is reduced and Zn is oxidized.

3. How many faradays are transferred in an electrolytic cell when a current of 2.0 amperes flows for 12 hours? a. 24 F b. 6.2 x 10-³F c. 1.1 F d. 8.6 x 104 F e. 0.90 F

A true statement in the ff. Is are: A.extracting current from a secondary battery is called charging. B.fuel cell batteries use lithium C.corrosion of steel can be inhibited by galvanizing D. a reference half-cell is the standard zinc electrode E.all of these

6. Use the diagram below to explain how an iron object rusts. a. Copy the sketch and add labels to show the rusting process. Include the half-reactions that occur at the anode and the cathode. b. Write the overall reaction for the process.

How many Faraday is needed to deposit 8.0 moles of Sn from SnCl4? O a. 16.00 O b. 24.00 O c. 32.00 O d. 8.00

Cancel RESET 6. The anodic area of a metal surface is oxidized and loses its electrons to the cathodic area. At the cathodic area the oxygen reduces and reacts with the oxidized metal to form metal oxide, so called a. Cathode c. Iron d. Rust b. Electrolyte 7. When an ionic substance is dissolved in water or melted then the ions are free to move. a. True b. False 8. A process of converting the ions of a compound in a liquid state into their reduced or oxidiz I state by passing an : current through compound. a. Electrolytes b. Electrocution c. Cannot be determined c. Electrolysis d. Electricity # Done