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How Produce Pure Calcium Carbonate

Filter off this precipitate and wash it.Dry the calcium carbonate in an oven at 248 degrees fahrenheit.4.Heat the calcium carbonate at about 1,832 degrees fahrenheit.This will produce lime, or cao, according to the following reaction caco3 heat - cao co2.5.Add aluminum and heat this mixture in a vacuum to 2,552 degrees fahrenheit.