Complete this net ionic equation and show your work:

SO₄(aq) + Ba(aq) +  > BaSO₄(s)

Explanation:

(aq) will always become 2 ions

balancing the equation

Na₂SO₄(aq) + BaCl₂(aq) > BaSO₄ + 2NaCl

note how there is the same amount of each element on both sides except for Na and Cl. the left side has 2 times the amount of the right side. All I needed to do to balance was add the 2 coefficient to NaCl product on right side since Na and Cl are together and not in separate compounds.

now rewriting (NaCl is aq since all compounds with Na are aqueous)

barium sulfate is the solid formed

rewriting the equation: (subscripts of single elements become coefficients, polyatomic subscripts stay)

2Na(aq) + SO₄(aq) + Ba(aq) + 2Cl(aq) > BaSO₄(s) + 2Na(aq) + 2Cl(aq)

net ionic: removing any substance seen on both sides

SO₄(aq) + Ba(aq) +  > BaSO₄(s)

the correct answer is:

a. formation of precipitation