Answer to Question #153958 in Physical Chemistry for sads

Question

Cl2 (g) + 2OH- (aq) → ClO- (aq) + Cl- (aq) + H2O (l)          Equation 1

2H+ (aq) + ClO- (aq) + 2I- (aq) → Cl- (aq) + I2 (aq) + H2O (l)      Equation 2

I2 (aq) + I- (aq) → I3- (aq)                                         Equation 3

I3- (aq) + 2S2O32- (aq) → 3I- (aq) + S4O62- (aq)                   Equation 4

The reaction of triiodide with thiosulfate produces the dithionate ion, S4O6 2-. Calculate the oxidation number for sulfur in this ion. Calculate (and show your work) the average oxidation number of S in this ion

Answer 1

Solution.

The average degree of sulfur oxidation based on calculations is +2.5:

$4 \times x -12 = -2$

x = +2.5

However, due to the S-S bond, the oxidation state doubles. Thus, the oxidation state of the sulfur atom, which is connected to oxygen atoms, is +5.

Answer:

The average degree of sulfur oxidation based on calculations is +2.5.

However, due to the S-S bond, the oxidation state doubles. Thus, the oxidation state of the sulfur atom, which is connected to oxygen atoms, is +5.