Electrochemistry+Questions

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by Vicki Lee //Three Multiple Choice Questions// 1. In a galvanic cell, the anode is nickel (II) and the cathode is silver. What would the anode and cathode be for an electrolytic cell? a) Nickel (II) and silver, respectively b) Silver and nickel (II), respectively c) Neither nickel (II) or silver (Answer: B) 2. An electrolytic cell for electrolysis composed of two metal electrodes, an electrolyte, conducting wires and a beaker. What is missing? a) An additional beaker b) A voltmeter c) A power supply (Answer: C) 3. In order to electroplate a pendant with gold, which of the following is true? a) The pendant will be the cathode and gold the anode b) The solution in the beaker must contain gold ions or a salt bridge will be required c) Both a) and b) (Answer: C) //Two Short Answer Questions// 1. When you electrolyze distilled water with metal electrodes and a power supply, no reaction occurs. Why? What must be changed? Answer: This happens because distilled water does not have enough ions to carry a current. To get the cell working, dissolve an electrolyte (such as NaCl) into the distilled water or replace it with tap water. 2. Although the Halt-Herout method of aluminum production is cost-effective, there are disadvantages beyond the scope of money. Name a few and suggest alternatives to it. Answer: The Halt-Herout method has many negative impacts on the environment, such as the large amount of energy consumed and the greenhouse gases the process emits into the atmosphere. Instead of creating new aluminum, companies can recycle it, which costs only a fraction of the price and energy to produce it.
 * Electrolysis Questions**