\( 100 ml \) of mixture of \( NaOH + Na _{2} CO _{3} \), when titration with \( \frac{ N }{10} HCl \) using Phenolphthalein indicator required \( 100 ml HCl \) to decolorize Phenolphthalein. The same Vol. of mixture when titrated with \( \frac{ N }{10} HCl \) using methyl orange indicator required \( 120 ml \) of \( HCl \). Calculate the amount of \( Na _{2} CO _{3} \) and \( NaOH \) in one litre of the mixture
