Which of these is an application of electrolytic separation?
obtaining metals from metal ores
covering a corrosion-prone metal, like iron, with a thin layer of chromium
running voltaic cells in reverse to charge them
covering plastics with a thin layer of metal to produce inexpensive metal-looking utensils
I think A is the best choice but sometimes it isn't easy to separate metals this way.
An application of electrolytic separation is obtaining metals from metal ores.
The application of electrolytic separation can be determined by analyzing the given options.
Option 1: Obtaining metals from metal ores
Electrolytic separation is commonly used to extract metal from metal ores. This process involves the use of an electric current to break down the metal compounds present in the ore, resulting in the deposition of pure metal on the cathode.
Option 2: Covering a corrosion-prone metal, like iron, with a thin layer of chromium
This application refers to a technique known as electroplating, which involves the use of electrolytic separation. In this process, a metal object is submerged in a solution containing ions of the desired metal. By passing an electric current through the solution, the metal ions are deposited onto the object's surface, creating a thin layer of the desired metal. This technique is often used to improve corrosion resistance and enhance aesthetics.
Option 3: Running voltaic cells in reverse to charge them
This option is not associated with electrolytic separation. Instead, it describes the process of reversing the functionality of a voltaic cell to act as an electrolytic cell, which allows for the charging of the cell.
Option 4: Covering plastics with a thin layer of metal to produce inexpensive metal-looking utensils
This application also falls under electroplating, which utilizes electrolytic separation. By applying a conductive coating to the plastic surface and then electroplating it with a thin layer of metal, inexpensive metal-looking utensils can be produced.
Therefore, the correct answer is:
- Obtaining metals from metal ores
- Covering a corrosion-prone metal, like iron, with a thin layer of chromium
- Covering plastics with a thin layer of metal to produce inexpensive metal-looking utensils