Question

To make barium sulfate from 1 equiv barium nitrate, how many equiv of sodium sulfate are required?

Answer 1

Just the one.........

Explanation:

`Na_2SO_4(aq) + Ba(NO_3)_2(aq) rarr BaSO_4(s)darr+ 2NaNO_3(aq)`

Barium sulfate is pretty insoluble stuff, and will precipitate from solution as a white solid. Its solubility in aqueous solution is negligible.