part a: Iodine, I 2 , reacts with aqueous thiosulfate ion in neutral solution ac

Question

part a:
Iodine, I2, reacts with aqueous thiosulfate ion in neutral solution according to the balanced equation I2(aq)+2S2O2?3(aq)?S4O2?6(aq)+2I?(aq).
How many grams of I2 are present in a solution if 33.90mL of 0.145M Na2S2O3 solution is needed to titrate the I2solution?
MI2 = ?g


part a:
Iodine, I2, reacts with aqueous thiosulfate ion in neutral solution according to the balanced equation I2(aq)+2S2O2?3(aq)?S4O2?6(aq)+2I?(aq).
How many grams of I2 are present in a solution if 33.90mL of 0.145M Na2S2O3 solution is needed to titrate the I2solution?
MI2 = ?g

Explanation / Answer

I2(aq)+2S2O2?3(aq)?S4O2?6(aq)+2I?(aq).

let the mass of I2 be x.so,

number of moles =m/254

so, for one moles of iodine, 2 moles of thio is required.so,

(m/254)=0.5*33.9*10^-3*0.145

or m=0.624 grams

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