What is the classification of water when it contains dissolved salts of calcium and magnesium?

Water that contains dissolved salts of calcium and magnesium is classified as hard water. The presence of these minerals, specifically calcium and magnesium ions, contributes to the water's hardness. Hard water can lead to various challenges, such as scaling in pipes and appliances, which can reduce their efficiency and lifespan. Additionally, hard water can interact with soap, making it less effective for cleaning purposes, resulting in soap scum formation.

In contrast, soft water is characterized by the low concentration of calcium and magnesium ions. Neutral water refers to a balanced pH level and does not specifically pertain to mineral content, while balanced water is not a standard classification in terms of hardness. Therefore, the classification of hard water due to the presence of dissolved salts of calcium and magnesium is the correct one.