Question- 5453g of dried thyroid gland is ignited with Na2CO3, This is ioxidized withC15H11I4NO4 (FM 776.93).
I- + 3Br2 + 3H2O ------------> IO3- + 6Br- + 6H+
the excess Br2 is distroyed and treated with the excess KI
IO3- + 5I- + 6H+ --------------> 3I2 + 3H2O
The I2 is then titrated with 26.21 mL of .0928M (S2O3)^2-
I2 + (2S2O3)^2- ----------------> 2I2 + (S4O6)^2-
What is the % (w/w) of thyroxin in the gland?
Solve the above problem and provide steps with explanation