Titration exercise 3

10.0 cm³ of iodine solution was titrated with 0.100 M sodium thiosulfate solution . The titres were 12.30 cm³, 11.80 cm³ and 11.90 cm³.

What indicator is used and what is the colour change at the end-point?

What is the concentration of the iodine solution in g dm^-3?