why was the tertary butyl chloride washed with aqueous sodium hydrogen carbonate? what gas was evolved during the washing? write a balance chemical equation

See my answer here. https://www.jiskha.com/questions/1833460/why-was-the-tert-butyl-chloride-washed-with-aqueous-sodium-hydrogen-carbonate-what-gas

The equation is
NaHCO3 + H^+ ==> Na^+ + CO2 + H2O