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  • For a first order reaction, (A) products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes.

For a first order reaction, (A)\rightarrow products, the concentration of A changes from 0.1 M to 0.025 M in 40 minutes. The rate of reaction when the concentration of A is 0.01 M is :

Option: 1

1.73 \times 10^{-5}\: M/min


Option: 2

3.47 \times 10^{-4}\: M/min


Option: 3

3.47 \times 10^{-5}\: M/min


Option: 4

1.73 \times 10^{-4}\: M/min


Answers (1)

best_answer

For the first order reaction

k=\frac{2.303}{t}log\frac{a}{a-x}

a=0.1M,a-x=0.025\, M,t=40\, min

k=\frac{2.303}{40}log\frac{0.1}{0.025}=\frac{2.303}{40}log\, 4=0.0347\, min^{-1}

\left [ A \right ]\rightarrow product

Thus,rate=k\left [ A \right ]

rate=0.0347\times 0.01\, M\, min^{-1}

=3.47\times 10^{-4}\, M\, min^{-1}

 

Posted by

Divya Prakash Singh

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