Jitender Pal
Last Activity: 10 Years ago
Sol. The redox reaction involved are :
〖IO〗_3^- + 5I- + 6H+ → 3I2 + 3H2O
I2 + 2S2O_3^(2-) → 2I- + S4O_6^(2-)
Millimol of KIO3 used = 0.1/214 × 1000 = 0.467
⇒ millimol of I2 formed
= 3 × 0.467 = 1.4
⇒ millimol of Na2S2O3 consumed = 2 × 1.4 = 2.8
⇒ Molarity of Na2S2O3 = 2.8/45 = 0.062 M