If you mix aqueous solutions of sodium sulphate and barium chloride, what type of chemical reaction occurs and what is the evidence for it?
Double displacement; formation of a precipitate
Mixing sodium sulphate and barium chloride solutions exchanges ions between the two compounds (double displacement) and forms insoluble barium sulphate, seen as a white precipitate.
Hence, it is a double displacement reaction, evidenced by the formation of a precipitate.
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