Question

A chemistry graduate student is studying the rate of this reaction:

He fills a reaction vessel with

H2CO3

Am I supposed to use Excel?

O KINETICS AND EQUILIBRIUM Deducing a rate law from the change in concentration over time A chemistry graduate student is studying the rate of this reaction: H,Coz (aq) → H20 (aq) + CO2 (aq) He fills a reaction vessel with H, CO, and measures its concentration as the reaction proceeds: time (minutes) [H2CO3] 0.0300 M 1.0 0.0140 M 2. 00.00910 M 3.0 0.00675 M 4.0 0.00537 M Use this data to answer the following questions. Write the rate law for this reaction. rate = k 0 Calculate the value of the rate constant k. Round your answer to 2 significant digits. Also be sure your answer has the correct unit symbol. x 6 ?

Answer 1

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we try for and order kinetics formula used h = 4+kt " LAJ=oooryou Tal= 0.030M to 1 min -- I + Kx 1 min 0.0140m 0.030 m K= 38.10 m mint [A] = 0.00910M, [no] = 0.030M t = 2 min 2. - + K x 2 min 0.00910M 000301 K= 38.27 Mimint [A] = 0.00675M , [ad = 0.030M 3 t = 3 min 1 tk x3 min 0.00675M 0.030M k= 38.27 Mimint [A]=0000537m. [A=0-030M a. t= 4 min from e .. - = 1 + K x 4 min 0:00537m 0.030m .. K= 38.22 M 'min', above it is clear that reaction follows and order kinetics Rate = k [H2C03]? K= 38 M'min (on rounding the value of k to a significant) digits / Scanned with CamScanner