Question

How hardness of water reduced ?

Answer 1

Hard water treated with an ion exchangewater softener has sodium added. According to the Water Quality Association (WQA), the ion exchange softening process adds sodium at the rate of about 8 mg/liter for each grain ofhardness removed per gallon of water

Answer 2

Using caustic soda will, therefore, lower water hardness to a level that is equal to twice the reduction in bicarbonates belonging to the alkaline-earths. The water's M-alk. can only be lowered to approximately 3 or 4°F if there is sufficient permanent hardness available to combine with the sodium carbonate formed.


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