2. Kinetics of the decomposition reaction of dibromosuccinic acid
COOH-CHBr-CHBr-COOH = CHCOOH-CBrCOOH + HBr
(first order reaction) was studied by titrating samples of the same volume with an alkali solution. Calculate the average value of the reaction rate constant and the time after which 30% of the acid decomposes. See the table for titration results.

Time, min 0 214 380
Alkali volume, cm3 12.11 12.44 12.68

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