Write down the reaction equation depicted as a diagram: SO3 → H2SO4 → NA2SO4 → NACl

SO3 + H2O = H2SO4 – compound reaction
H2SO4 + Na2CO3 = Na2SO4 + CO2 + H2O – ion exchange reaction
Na2SO4 + BaCl = BaSO4 + NaCl – ion exchange reaction



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