Monday, 10 June 2013

The rate constant for a first order reaction is 60 s−1. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value?

Question 4.16: The rate constant for a first order reaction is 60 s−1. How much time will it take to reduce the initial concentration of the reactant to its 1/16th value?
Answer
Given that
Order of reaction =first
Rate constant k = 60 sec -1
If initial concentration [R]o = w g
Then final concentration [R] = w/16 g
Use the formula of first order reaction

t = 4.6 × 10−2 s
Answer
Time = 4.6 × 10−2 s.

5 comments:

  1. Sir why we take here the final concentration 1÷16in place of 15÷16

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    Replies
    1. Because the question says TO reduce to the one-tenth value not reduced BY one-tenth value

      Delete
  2. If there is word used decompose then how we will solve this question

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  3. Why initial concentration we take [R]° and final concentration [R] .... What is this sir R

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