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Seawater contains rich resources. when simulating the extraction of important industrial raw materials sodium chloride from seawater in chemical laboratories, the following operation procedures are designed: please (1) magnesium ions are precipitated by hydrogen and oxygen ions,The addition of excessive lime milk can precipitate magnesium ions,The sulfate ion is precipitated by the barium ion,The addition of excessive barium chloride can precipitate the sulfate ion,As for removing magnesium ions first,Or remove sulfate ions first,Calcium ions are precipitated by carbonate ions,The addition of calcium ions into sodium carbonate was converted into precipitation,But the added sodium carbonate should be placed after the added barium chloride,In this way, sodium carbonate will remove the remaining barium chloride in the reaction,The ions are all deposited,In the process of filtering,Finally, hydrochloric acid was added to re