Final Answer:
The most common brine used in ice rinks is sodium chloride (option A).
Step-by-step explanation:
Sodium chloride, commonly known as table salt, is the most prevalent brine used in ice rinks for its effectiveness in lowering the freezing point of water (option A). When dissolved in water, sodium chloride forms a solution that exhibits freezing point depression, preventing the formation of solid ice at temperatures above the normal freezing point. This property is crucial for maintaining a consistent and controlled skating surface in ice rinks.
The process involves creating a brine solution by dissolving sodium chloride in water. The resulting brine solution has a lower freezing point than pure water, allowing it to remain in a liquid state at temperatures below the freezing point of water. This liquid brine is then circulated through a network of pipes beneath the ice rink surface. As the brine absorbs heat from the ice, it prevents the ice from melting and maintains a solid, skateable surface.
The choice of sodium chloride as the common brine for ice rinks is not only due to its cost-effectiveness but also its compatibility with the requirements of ice maintenance. The ability of sodium chloride to depress the freezing point of water efficiently ensures the creation of a stable and durable ice surface, making it the preferred choice for ice rink applications.