Electrolytic Refining of Copper Concepts

The video tutorial covers the electrolytic refining of metals, focusing on copper. It explains the process of electrolysis used to obtain pure metals, detailing the setup with an acidified copper sulfate solution, an impure copper anode, and a pure copper cathode. The video describes how copper ions move to the cathode, gaining electrons and depositing as pure copper, while copper atoms from the anode dissolve into the solution. The process maintains electrolyte concentration, leading to the growth of the cathode and reduction of the anode. Impurities settle as anode mud.

What is the primary purpose of electrolytic refining?

• To change metal color

• To create alloys

• To obtain pure metals

• To increase metal weight

In the electrolytic refining of copper, what is used as the electrolyte?

• Acidified copper sulfate solution

• Pure water

• Saltwater

• Diluted sulfuric acid

What role does the anode play in the electrolytic refining of copper?

• It remains unchanged

• It releases copper ions into the solution

• It attracts copper ions

• It acts as a filter

During the electrolytic refining process, what happens to copper ions at the cathode?

• They remain in the solution

• They dissolve in the solution

• They gain electrons and deposit as pure copper

• They lose electrons and form copper oxide

What is the result of copper atoms losing electrons at the anode?

• They become copper ions and dissolve

• They deposit on the cathode

• They form copper oxide

• They remain as copper atoms

What is the term for the impurities that settle at the bottom during electrolytic refining?

• Copper sediment

• Electrolyte residue

• Anode mud

• Cathode sludge

What happens to the size of the anode and cathode during the refining process?

• Anode increases, cathode decreases

• Both increase

• Both decrease

• Anode decreases, cathode increases

What ensures the concentration of the electrolyte remains constant during the process?

• Temperature control

• Copper ions dissolving and depositing

• Addition of more electrolyte

• Continuous stirring