The oxidation of sulfite ion by triiodide ion is proposed to take place by the following mechanism: — Kinetics Chemistry Question
Question
The oxidation of sulfite ion by triiodide ion is proposed to take place by the following mechanism:
I3– ⇌ I2 + I– fast, unfavorable
SO3 2- + I2 → ISO3– + I– slow
ISO3– + H2O → HSO4– + I– + H+ fast
What rate law is predicted by this mechanism?
A.
Rate = k[I3–]
B.
Rate = k[I3–][SO32-]
C.✓ Correct
Rate = k[I3–][SO32-]/[I–]
D.
Rate = k[I3–][SO32-]/[H+]
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