Question

What precipitate is most likely formed from a solution containing Ba+2, Na+1, OH-1, and CO3-2.

Answer 1

Barium carbonate salt will form as a slightly soluble precipitate:

Ba⁺²(aq) + 2OH^-1(aq) + 2Na⁺¹(aq) + CO₃^-2(aq) = BaCO₃(s) + 2Na⁺¹(aq) + 2OH^-1 (aq)

The equation above is an ionic equation of the following chemical reaction:

Ba(OH)₂ (aq) + Na₂CO₃ (aq)= BaCO₃ (s) +2NaOH (aq)

where formation of a precipitate is a driving force of the reaction.