A chemical engineer is studying the rate of this reaction 201,05 (g) 2Cl-(g) + 5

Question

A chemical engineer is studying the rate of this reaction 201,05 (g) 2Cl-(g) + 502 (g) He fills a reaction vessel with Cl,O and measures its concentration as the reaction proceeds. Here's a graph of his data Use this graph to answer the following questions: What is the half life of the reaction? Round your answer to 2 significant digits. Suppose the rate of the reaction is known to be first order in CI,Os. Calculate the value of the rate constant k 15 Round your answer to 2 significant digits. Also be sure you include the correct unit symbol. Predict the concentration of Cl,0 in the engineer's reaction vessel after 160. seconds have passed Assume no other reaction is important, and continue to 0.5 40 60 30 100 t (seconds) assume the rate is first order in Cl,O Round your answer to 2 significant digits.

Explanation / Answer

inital concentration = 1.8 M

half life is the time needed to reduce the half of the amount in intial = 0. 9 M

here from graph . time = 40 sec

half life = 40.sec

rate constant = 0.693 / half life

                     = 0.693 / 40

                    = 0.017 s-1

rate constant = 0.017 s-1

Ao = 1.8

k = 0.017 s-1

time = t = 165 sec

k = 1/ t * ln [Ao / At]

0.017 = 1/ 160 * ln (1.8 / At)

At =0.12 M

concentration = 0.12 M

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