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Unformatted text preview: start the reaction. 15 minutes later, take out a 10mL aliquot of
the solution into another Erlenmeyer flask and mix it with 10mL of isopropanol to quench the
solution, as well as 2 drops of phenolphthalein. Titrate this sample with standardized NaOH
(0.5M) that was filled in a burette, until the endpoint was reached, which is when the solution
just turns pink. Record the time this took place and the volume of NaOH used. Repeat this
titration again after 30, 45, 60, 90 and 120 minutes after the reaction...
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