Okay, Na2CO3 + H2SO4 -> Na2SO4 + H2O + CO2 However there is a catch, If you're using Baking soda It's acutally sodium bicarbonate, I don't think sodium carbonate reacts with H2SO4. read more
There is a reaction between sulfuric acid and sodium bicarbonate (also called sodium hydrogen carbonate and baking soda). This reaction produces sodium sulfate, carbon dioxide, and water. read more