Write the reaction equations that show that barium can displace sodium from an aqueous solution of sodium chloride.

BaCl2 + Na2SO4 = BaSO4 + 2 NaCL

Barium in the row of intensity of metals is located to the left of sodium, that is, it could displace the metals that are to the right of it. But like alkali metals, which interact violently with water in solution, it will not displace sodium. Therefore, you can write the exchange reaction

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