1. a mixture of naoh and na2co3 solution required 20.50 ml of 0.5 m hcl using
phenolphthalein as indicator. the same amount of alkali mixture when titrated using
methyl orange as an indicator required 27.25 ml of same acid. obtain an expression
for the volumes of acid required to neutralize (i) koh and (ii) na2co3 present in
solution