Calculate the oxidation number of ‘S’ in H S O . 2 2 7

Question

Accepted Answer

- Identify the formula: the given formula is H2S2O7 (disulfuric/pyrosulfuric acid).
- Assign usual oxidation numbers: H is +1, O is -2. Let the oxidation state of S be $x$ (for each S atom).
- Write the charge balance for the neutral molecule:
  $2(\!+1\!) + 2x + 7(\!-2\!) = 0$.
- Solve:
  $2 + 2x -14 = 0 \Rightarrow 2x -12 = 0 \Rightarrow x = 6$.

So the oxidation number of S is +6, which is option (3) — corresponding to choice c.

FINAL_ANSWER: c

Answer

Answer

Answer