Advanced Placement (AP) Chemistry Practice Exam

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What is the role of electrolytes in a solution?

  1. They provide color to the solution

  2. They facilitate the separation of components

  3. They conduct electricity

  4. They change the boiling point of the solution

The correct answer is: They conduct electricity

Electrolytes play a crucial role in conducting electricity within a solution due to their ability to dissociate into ions when dissolved in water or another solvent. When electrolytes are added to a solution, they break apart into positively and negatively charged ions, which can freely move throughout the liquid. This movement of charged particles allows the solution to carry an electric current. In various applications, such as batteries, biological systems, and electrochemical cells, the presence of electrolytes is essential for facilitating electrical conductivity. This property is fundamental to many chemical processes and reactions that rely on ion movement. While electrolytes can influence other properties of a solution, such as the boiling point or color, their primary and defining role is in electrical conductivity.

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