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Hard water is a fact of life across most of the U.S. Learn how to remove hard water stains and build-up in your home. ... How to clean your bathtub . Slow draining sink:How to fix a hideous clog.
A bathtub faucet with built-up calcification from hard water in Southern Arizona. Hard water is water that has a high mineral content (in contrast with "soft water"). Hard water is formed when water percolates through deposits of limestone, chalk or gypsum, [1] which are largely made up of calcium and magnesium carbonates, bicarbonates and sulfates.
Calcium soaps are insoluble in water, [5] and fairly hard. [3] They are familiar, in areas with calcium-rich ("hard") water, as deposits in bathtubs, sinks, and showers; when soap is mixed with the water's dissolved calcium carbonate/lime, calcium soaps form. 2 C 17 H 35 COO − Na + + Ca 2+ → (C 17 H 35 COO) 2 Ca + 2 Na +
The surface of human skin has a light charge that the soap tends to bind with, requiring more effort and a greater volume of water to remove. [4] Hard water contains calcium or magnesium ions that form insoluble salts upon reacting with soap, leaving a coating of insoluble stearates on tub and shower surfaces, commonly called soap scum. [4] [5]
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Hard water contains calcium and magnesium ions, which react with the surfactant anion to give these metallic or lime soaps. [1] 2 C 17 H 35 COO − Na + + Ca 2+ → (C 17 H 35 COO) 2 Ca + 2 Na + In this reaction, the sodium cation in soap is replaced by calcium to form calcium stearate. Lime soaps build deposits on fibres, washing machines, and ...