In a pseudo first order hydrolysis of ester in water, the following results were obtained.What will be the average rate of reaction between the time interval $30$ to $60$ seconds?

1.91 \times 10^{- 2} m o l L^{- 1} s^{- 1}

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4.67 \times 10^{- 3} m o l L^{- 1} s^{- 1}

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1.98 \times 10^{- 3} m o l L^{- 1} s^{- 1}

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2.07 \times 10^{- 2} m o l L^{- 1} s^{- 1}

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Solution

The correct option is B $4.67 \times 10^{- 3} m o l L^{- 1} s^{- 1}$
Average rate during the time interval $30 - 60 s$ is given by,

$R a t e = \frac{C_{2} - C_{1}}{t_{2} - t_{1}} = \frac{(0.31 - 0.17)}{60 - 30} = \frac{0.14}{30}$

$= 4.67 \times 10^{- 3} m o l L^{- 1} s^{- 1}$ .

Hence, the correct answer is option $B$ .

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Q. In a pseudo first order hydrolysis of ester, the following results were obtained:

t in s	0	30	60	90
[Ester] in mol $L^{- 1}$	0.55	0.31	0.17	0.085

Calculate the average rate of reaction between the time interval 30 to 60 seconds.

At 27°C and 37°C the rates of a reaction are given as 1.6*10^-2 mol L^-1s^-1 and 3.2*10^-2 mol L^-1s^-1.Calculate the energy of activation for the give reaction.

Q. In a pseudo first order hydrolysis of ester in water the following results were obtained:

$t / s$	$0$	$30$	$60$	$90$
$[E s t e r] / M .$	$0.55$	$0.31$	$0.17$	$0.085$

(i) Calculate the average rate of reaction between the time interval

30

60

seconds.
(ii) Calculate the pseudo first order rate constant for the hydrolysis of ester.

Q. For the reaction 2A + B + C

\to A_{2} B

+ C the rate law is found to be Rate =k[A][B]

^{2}

with

k = 2 \times 10^{- 6} m o l^{- 2} L^{2} s^{- 1}

The initial rate of reaction with

[A] = 0.1 m o l L^{- 1}, [B] = 0.2 m o l L^{- 1} a n d [C] = 0.8 m o l L^{- 1}

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In a pseudo first order hydrolysis of ester in water, the following results were obtained.What will be the average rate of reaction between the time interval 30 to 60 seconds?

The correct option is B 4.67×10−3mol L−1s−1Average rate during the time interval 30−60 s is given by,Rate=C2−C1t2−t1=(0.31−0.17)60−30=0.1430 =4.67×10−3mol L−1s−1.Hence, the correct answer is option B.

In a pseudo first order hydrolysis of ester in water, the following results were obtained.What will be the average rate of reaction between the time interval $30$ to $60$ seconds?