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BaCl2(aq) + Na2SO4(aq) -> BaSO4(s) + 2NaCl(aq)
BaCl2(s) + Na2SO4(aq) -> BaSO4(s) + 2NaCl(aq)
BaCl2(aq) + Na2SO4(s) -> BaSO4(s) + 2NaCl(aq)
BaCl2(s) + Na2SO4(s) -> BaSO4(aq) + 2NaCl(s)
Continue with nearby questions to strengthen the same chapter concept while you still have the context fresh in mind.