1
For the reaction 6H+ + BrO3- + 5Br- 3Br2 + 3H2O which of the following relation correctly represents the consumption and formation of products.
- d[Br2]dt = - 35 d[Br-]dt
- d[Br2]dt = 35 d[Br-]dt
- d[Br2]dt = - 53 d[Br-]dt
- d[Br2]dt = 53 d[Br-]dt
Answer
(1) d[Br2]dt = - 35 d[Br-]dt
Solution
∵ As per NCERT, for a reaction the rate is obtained by dividing the rate of change of concentration of each species by its stoichiometric coefficient (with a minus sign for reactants):
Rate = - 15 d[Br-]dt = 13 d[Br2]dt
⇒ d[Br2]dt = - 35 d[Br-]dt
Answer: (1)
AIPMT 2000