Titration Lab \begin{tabular}{l} 0.35g unknown solid corbosute \\ Intial volume =2.0mL \\ Final volume =24mL \\ volume ussed =22mL \\ \hline Titration 19 \end{tabular} Calculate the molar mass of the unknoum carbonate and attempt an identification with \% error, discuss concept of a back-titration= Concentration of standard NaOH=9.9102 concentration of standed HCl=8.5102 Sy Lab A-5: To find the molar mass of an insoluble carbonate(1) (XCO3) and attempt to "identify" it. ased Accurately mass out between 0.3 and 0.4g of the unknown solid carbonate(1) and dissolve it in 50mL of standard HCl. Heat the flask gently for 13 minutes to drive off the CO2 that is produced. Wash the sides down with a small amount of water and allow to cool. - Back- titrate with standard NaOH from your buret to a neutral point. (Don't do a rough titration ) - Repeat as necessary but do not use the same mass each timel - Now calculate the molar mass of the unknown carbonate(1) and attempt an identification(be practical) with % error " you should discuss the concept of a "back-titration