Explain why a mixture is used as the electrolyte instead of using only aluminium oxide

Final answer: A mixture of cryolite and aluminum oxide is used as the electrolyte in the Hall-Héroult process for aluminum production. This mixture has a lower melting point, increased conductivity, and provides a source of aluminum ions for the electrolysis process. Explanation: In the Hall-Héroult process for aluminum production, a mixture of cryolite and aluminum oxide is used as the electrolyte instead of using only aluminum oxide. This is because the mixture has several advantages: Lower melting point: Cryolite is added to the mixture to lower its melting point. Pure aluminum oxide has a very high melting point, making it difficult to use as the electrolyte. By adding cryolite, the melting point of the mixture is significantly reduced, making it easier to conduct electricity. Conductivity: The presence of cryolite increases the conductivity of the electrolyte. This allows for a more efficient flow of electric current through the cell, facilitating the electrolysis process. Source of aluminum ions: Aluminum oxide is added to the mixture to provide a source of aluminum ions for the electrolysis process. When the electric current is passed through the electrolyte, aluminum ions are reduced at the cathode, forming liquid aluminum. Overall, the use of a mixture of cryolite and aluminum oxide as the electrolyte in the Hall-Héroult process allows for the extraction of pure aluminum from its ore, bauxite, in a more efficient and practical manner. Learn more about electrolytes in aluminum production here: brainly.com/question/34712996 #SPJ11