What is the chemical equation for nahco3 and aspirin?

Answer 1

It's very similar to that between benzoic acid and sodium hydrogencarbonate. All you will have to do is to add the extra bit onto the benzene ring - it doesn't do anything in the reaction.

C6H5COOH + NaHCO3 -----> C6H5COONa + CO2 + H2O