In order to standardise a solution of sodium hydroxide a chemist first prepared a solution of ethanedioic acid-2 water H2C204 2H2O by dissolving 14.6g of crystals in water and making uo the solution to 250cm3 in a graduated flask he then pipetted 25.0cm3 of this solution of into a conical flask, added phenolphthalein solution as indicator and titrated it against the sodium hydroxide solution 24.1 cm3 of the latter was required calculate the molar concentration of the ethanedioc acid solution and then that of the sodium hydroxide
