Question

What mass of baking soda (NaHCO3) would be required to neutralize 10.00mL of 12.1M muriatic acid remaining in a empty water bottle?

HCl(aq)+NaHCO3(aq)=>NaCl(aq)+CO2(g)+H2O(l)

Answer 1

First you must know how much muriatic acid (HCl) remains in the empty bottle (note: if the bottle is empty there can be no HCl in the bottle.:0). Then follow the steps in this link.
http://www.jiskha.com/science/chemistry/stoichiometry.html