how sodium carbonate is used for softening of hard water
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Hard water can be softened by adding washing soda (sodium carbonate) which removes the calcium ions in a precipitation reaction. Alternatively, the hard water can be passed through an ion-exchange resin in a column. Sodium ions replace the calcium ions in the water as it passes through the column
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Sodium carbonate, Na2 CO3 , is also known asаwashing soda. It can remove temporary and permanent hardness from water. ... The water is softened because it no longer contains dissolved calcium ions and magnesium ions. It will form lather more easily with soap.
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