In the following reaction, which substance is the precipitate?

(nh4)2so4(aq) + ba(no3)2(aq) baso4(s) + 2nh4no3(aq)

(nh4)2so4
ba(no3)2
baso4
nh4no3

The state symbols show the precipitate. A precipitate is always a solid formed in a reaction so just look for the product (right hand side of the arrow) that has a (s) symbol after it.

(NH4)2SO4(aq) + Ba(NO3)2(aq) --> BaSO4(s) + 2NH4NO3(aq)
so BaSO4 solid is produced in this reaction so that is the precipitate.

(aq) means dissolved in water so in this reaction you would be mixing two compounds dissolved in water and you would get a visible solid BaSO4 precipitate out of it. Pretty cool huh?

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