Question: A solution containing Na₂CO₃ and NaOH requires 300 ml of 0.1 N HCl using phenolpthalein as an indicator. Methyl orange is then added to the above titrated solution when a further 25 ml of 0.2 N HCl is required. The amount of NaOH present in solution is ( NaOH=40, Na₂CO₃=106)
(a) 0.6 g
(b) 1.0 g
(c) 1.5 g
(d) 2.0 g
Correct Answer: (b) 1.0 g