A 0.4671g sample containing sodium bicarbonate (a mono acidic base) is dissolved and titrated with standard solution of HCl acid requiring 40.72cm^3. ( the HCL was standardized by titrating 0.1876NaCO3 which required 37.86cm^3 of acid). Calculate the percent NaCO2 in the sample

Answer 1

The HCl was standardized with what? You have NaCO3 and that can't be. Is it NaHCO3 or Na2CO3. If Na2CO3 I must know what was used for the indicator.