high school stoichiometry

Question

If 6.3g of NaHCO3 are added to 15.0g of CH3COOH solution,the residue of the reaction is found to weigh 18.0g. what is the mass of CO2 released in the reaction.

Answer 1

First, write the correctly balanced equation for the reaction taking place:

NaHCO3(aq) + CH3COOH(aq) ==>CH3COONa(aq) + H2CO3(aq) ==> CO2(g) + H2O(l) + CH3COONa(aq)

Assuming the "residue" referred to is CH3COONa, we have the following relationship:

18.0 g CH3COONa x 1 mol CH3COONa/82.0 g x 1 mol CO2/mol CH3COONa x 44 g CO2/mol = 9.66 g CO2