1. A certain amount of methyl was hydrolysed in the presence of an excess of 0.05 mol dm^-3 hydrochloric acid at 250C. When 25 cm^3 aliquots of reaction mixture were removed and titrated with NaOH solution, the volume V of alkali required for neutralisation after time t were as follows. t/ min 0 21 V/ cm^3 24.4 25.8 Determine reaction order with substitution methods and graphical methods and calculate the rate constant and half time this reaction. (Avery, 32) 75 29.3 119 31.7 47.2

Fundamentals Of Analytical Chemistry
9th Edition
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Chapter26: Molecular Absorption Spectrometry
Section: Chapter Questions
Problem 26.17QAP
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1. A certain amount of methyl was hydrolysed in the presence of an excess of 0.05 mol dm^-3
hydrochloric acid at 250C. When 25 cm^3 aliquots of reaction mixture were removed and
titrated with NaOH solution, the volume V of alkali required for neutralisation after time t
were as follows.
t/ min
21
75
119
V/ cm^3 24.4
Determine reaction order with substitution methods and graphical methods and calculate the
rate constant and half time this reaction. (Avery, 32)
25.8 29.3
31.7
47.2
Transcribed Image Text:1. A certain amount of methyl was hydrolysed in the presence of an excess of 0.05 mol dm^-3 hydrochloric acid at 250C. When 25 cm^3 aliquots of reaction mixture were removed and titrated with NaOH solution, the volume V of alkali required for neutralisation after time t were as follows. t/ min 21 75 119 V/ cm^3 24.4 Determine reaction order with substitution methods and graphical methods and calculate the rate constant and half time this reaction. (Avery, 32) 25.8 29.3 31.7 47.2
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