BITSAT2014ChemistryChemical KineticsActual
The reduction of peroxydisulphate ion by I ion is expressed by S ₂ O ₈²⁻+3 I ⁻ 2 SO ₄²⁻+ I ₃⁻ . If rate of disappearance of I ⁻ is 9 / 2 10⁻³ ~mol lit ⁻¹ s ⁻¹, what is the rate of formation of 2 SO ₄²⁻ during same time?
Options
- A3 10⁻³ ~mol Lit ⁻¹ ~s ⁻¹
- B2 10⁻³ ~mol Lit ⁻¹ ~s ⁻¹
- C10⁻³ ~mol Lit ⁻¹ ~s ⁻¹
- D4 10⁻³ ~mol Lit ⁻¹ ~s ⁻¹
Correct answer
A. 3 10⁻³ ~mol Lit ⁻¹ ~s ⁻¹
Step-by-step solution
1 d [ SO ₄²⁻ ] 2 = 1 3 (- d ( I ⁻ ) d t ) 1 2 d [ SO ₄²⁻ ] d t = 1 3 9 2 10⁻³ d [ SO ₄²⁻ ] d t =3 10⁻³ ~mol Lit ⁻¹ ~s ⁻¹