Answer to Question #59968 in Chemistry for panos

Question

In 50,00 ml of a solution (solution A) containing Na2CO3 and Na2SO4, 25,00 ml of BaCl2 about 0,2 M (excess) are added.The forming precipitate is removed and stored and the excess of Ba2{+} is titrated with 21,80 ml of EDTA 0,0705 M. During the blank titration 50,00 ml of water were used and 37,40 ml of EDTA were consumed. The precipitate that was stored, is heated with 20,00 ml of HCl about 0,1N and the excess of the acid is titrated with 11,01 ml of NaOH solution 0,0990 M. During the blank titration 20,00 ml of HCl solution were used and 21,11 ml of NaOH solution were consumed. Write all the reactions that take place and calculate the molar concentrations of Na2CO3 and Na2SO4 in solution A in mmol.ml