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Manipal MET2014ChemistryChemical Kinetics

Consider the following reaction in aqueous solution. aligned & 5 Br ⁻(a q)+ BrO ₃⁻(a q)+6 H ⁺(a q) 3 Br ₂(a q) &+3 H ₂ O (l) aligned If the rate of appearance of Br ₂ at a particular moment during the reaction is 0.025 Ms ⁻¹ , what is the rate of disappearance (in Ms ⁻¹ ) of Br ⁻ at that moment?

Options

  1. A0.025 ~ms ⁻¹
  2. B0.042 ~ms ⁻¹
  3. C0.075 ~ms ⁻¹
  4. D0.125 ~ms ⁻¹

Correct answer

B. 0.042 ~ms ⁻¹

Step-by-step solution

The two rates are related as- . 1 5 d [ Br ⁻ ] d t = 1 3 d [ Br ₂ ] d t ]- d [ Br ⁻ ] d t = 5 3 d [ Br ₂ ] d t = 5 3 0.025=0.042 ms ⁻¹

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