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Mixing an aqueous solution of calcium chloride (CaCl2) with another of sodium carbonate (Na2CO3) produces calcium carbonate (CaCO3) tha is practically insoluble and precipitates. It is also produced sodium chloride (NaCl) that stays dissolved in the water. It is a double displacement and precipitation reaction.CaCl2 + Na2CO3 → CaCO3 + 2NaClAt the moment of the reaction it is observed a white precipitate of calcium carbonate. In order to separate it I use a piece of filter paper on a funnel.
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