The reaction Aaq - Baq-Caq is monitored by measuring optical rotation of reaction mixture at different time interval- The species A- B and C are optically active with specific rotations 20- 30- and -40- respectively- Starting with pure A if the value of optical rotation was found to be 2-5- after 6-93- minutes and optical rotation was -5- after infinite time- Find the rate constant for the first-order conversion into A into B and C-

The correct option is D 0.1 min^ 1 As nbsp;after completion of the reaction rotation is nbsp; 5 ^∘ So according to first order reaction k = 2 ...

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Standard XII

Chemistry

Rate Constant

The reaction ...

Question

The reaction $A (a q) \to B (a q) + C (a q)$ is monitored by measuring optical rotation of reaction mixture at different time interval. The species A, B and C are optically active with specific rotations $20^{\circ}, 30^{\circ}$ and $- 40^{\circ}$ respectively. Starting with pure A if the value of optical rotation was found to be ${2.5}^{\circ}$ after ${6.93}^{\circ}$ minutes and optical rotation was $- 5^{\circ}$ after infinite time. Find the rate constant for the first-order conversion into A into B and C:

0.1 m i n^{- 1}

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0.2 m i n^{- 1}

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0.3 m i n^{- 1}

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0.4 m i n^{- 1}

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Solution

The correct option is D $0.1 m i n^{- 1}$
As after completion of the reaction rotation is $- 5^{\circ}$ So according to first order reaction $k = 2.303 l o g (r_{0} - r_{\infty}) / (r_{t} - r_{\infty}) / 6.93 = 0.1 / m i n$

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Similar questions

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The correct option is D 0.1min−1As after completion of the reaction rotation is −5∘So according to first order reactionk=2.303log(r0−r∞)/(rt−r∞)/6.93=0.1/min

The correct option is D $0.1 m i n^{- 1}$
As after completion of the reaction rotation is $- 5^{\circ}$ So according to first order reaction $k = 2.303 l o g (r_{0} - r_{\infty}) / (r_{t} - r_{\infty}) / 6.93 = 0.1 / m i n$