what other chemicals will you prefer to use in place of sodium carbonate in order to remove calcium and magnesium ions from water
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alum will used in place of sodium
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A water softener is a device that exchanges cations. What this essentially does is take the cations of calcium and magnesium (the two most common causes of hard water) and replace them with the cations of another substance. Most typically the ions are exchanged with ions from dissolved sodium chloride salt (brine).
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