.all 125.1 2:22 am 5- (2 pts) The composition ofa liquid-phase reaction 2A -B wa

Question

.all 125.1 2:22 am 5- (2 pts) The composition ofa liquid-phase reaction 2A -B was followed by a spectrophotomctric method with the flloning resuls min BI/(maidm 0 0.089 0.153 0.200 0.230 Determine the onder of the reaction and its rate constant 0.312 6- (3 pts) Temperature-ump method was used to determine the kinetic parameters for the dissociation of water (page 379 in the textbook). The relaxation time for the reaction was found to be 37x10's at 25.0 Calculate the rate constant for the forward and reverse reaction

Explanation / Answer

Determine the order of reaction, by drawing a graph. Plot the data according to the integrated rate law for different reaction orders.

If the plot yields a straight line, it shows that the overall reaction order.

The slope of straight line is related to the rate constant.

The half-life of the reaction also depends on the overall reaction order.

The given data is as follows:

Time

[B] mol dm(-3)

0

0

10

0.089

20

0.153

30

0.2

40

0.23

Infinite

0.312

Plot a graph [B] versus time. Take [B] on Y-axis and time on X-axis. The graph is as follows:

The graph shows linear equation. It states that the given reaction is zero order reaction.

The rate equation of the reaction is as follows:

Time

[B] mol dm(-3)

0

0

10

0.089

20

0.153

30

0.2

40

0.23

Infinite

0.312

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