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Hard water refers to the presence of dissolved ions, mainly of calcium Ca2+ and magnesium Mg2+ which are acquired through contact with rocks such as limestone and dolomite which contain calcium and magnesium.The research aspect of this science fair project is to use a conductivity device to determine which actions will reduce the ionic concentration of hard water better, the addition of washing soda or rain water.
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Fecha publicaci?n: 12.5.2016
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