posted by Michi .
How many grams of I2 are present in a solution if 38.55ml of 0.160M Na2S2O3 solution is needed to titrate I2 the solution?
I2 + 2Na2S2O3 ==> Na2S4O6 + 2NaI
mols Na2S2O3 = M x L = ?
mols I2 = 1/2 mol Na2S2O3 (from the coefficients in the balanced equation).
g I2 = mols I2 x molar mass I2 = ?