Question

A $2.137$ g sample of a solid mixture containing only potassium carbonate ($\text{MM}=138.2058\text{g/mol}$) and potassium bicarbonate ($\text{MM}=100.1154\text{g/mol}$) is dissolved in distilled water. A volume of $32.59$ mL of a $0.784$ M HCl standard solution is required to titrate the mixture to a bromocresol green endpoint. Calculate the weight percent of potassium carbonate and potassium bicarbonate in the mixture.