Consider the following reaction sequence. Na2S+Na2SO3+I2→A+NaI A+I2→NaI+B If the molar mass of anhydrous form of B is X(gm/mole) and the number of sulphur atoms per molecule of B is Y, then find the value of X/Y.
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Solution
The complete reaction sequence is, Na2S+Na2SO3+I2→Na2S2O3(A)+NaI and Na2S2O3+I2→NaI+Na2S4O6(B) Thus, the molar mass of anhydrous form of B is (X)=270gm/mole The number of Sulphur atoms per molecule of B is Y=4 ∴XY=2704=67.50