경수에 대한 화학적 고찰에 대한 발표자료(영문 작성, 한글 설명노트 있음)

1. Hardness

temporary hardness and permanent hardness. Temporary hardness is caused by the presence of bicarbonate minerals, which can be removed by boiling the water. When water containing bicarbonate ions is heated, the bicarbonates decompose into carbonates, leading to the precipitation of calcium and magnesium as insoluble carbonates. This process effectively reduces the hardness of the water. On the other hand, permanent hardness is attributed primarily to the presence of sulfate and chloride salts of calcium and magnesium. Unlike temporary hardness, permanent hardness cannot be removed by boiling. Instead, it can be treated through methods such as ion exchange or the use of chemical softeners, which replace calcium and magnesium ions with sodium ions. High water hardness has several implications, especially in domestic settings where it can lead to scaling in pipes, boilers, and water heaters. This scaling not only reduces the efficiency of heating systems but also increases
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