Question

Na2So4+Ca(OH)2--------CaSO4+2NaOH​
Method of separation and purification CaSO4 From 2NaOH​ for use in industry

Answer 1

Answer:

Three types of treatment systems will remove sulfate from drinking water: reverse osmosis, distillation, or ion exchange. Water softeners, carbon filters, and sediment filters do not remove sulfate. Water softeners merely change magnesium or calcium sulfate into sodium sulfate, which is somewhat more laxative.