Kinetic Study of an Iodine Clock Reaction.
Flask A contains 5.00 mL of 6 M HCl (density 1.11 g/mL). Flask Bcontains 5.00 mL of the same 6M HCl solution used in flask A, 2.00mL of ethyl acetate (density 0.893 g/mL), and 3.00 mL of water(density 1.00 g/mL). Flask A was titrated with 1.00 M NaOH, and itrequired 31.95 mL to reach a phenolphthalein end point. Flask B wassealed and allowed to sit for 7 days to allow the system to reachequilibrium. At the end of the 7 day period, flask B was titratedwith 1.00 M NaOH, and it required 42.75 mL of NaOH solution toreach a phenolphthalein end point.
Using the information above answer the following questions for thesystem outlined below.
ethyl acetate + water <--> ethyl alcohol + acetic acid
1-Based on the titration information for flask A, determine thenumber of moles of HCl in 5.00 mL of the 6 M HCl solution used forthe experiment. Note that the concentration of the HCl solution isapproximately 6M, and the actual concentration may be slightlyhigher or lower. Do not include units in your answer.
2-Calculate the moles of water in a 5.00 sample of the 6M HClsolution used for the experiment. Do not include units in youranswer.
3-Determine the initial moles of water in flask B immediatelyafter mixing. Do not include units in your answer.
4-Determine the initial moles of ethyl acetate in flask Bimmediately after mixing. Do not include units with youranswer.
5-Determine the moles of acetic acid in flask B at equilibriumbased on the titration data for flask B. Note that the HCl that wasadded to the flask is still present at equilibrium. Do not includeunits in your answer.
6-Using the moles of acetic acid at equilibrium, thestoichiometry of the reaction, and the initial number of moles ofwater, determine the moles of water at equilibrium. Do not includeunits with your answer.
7-Using the moles of acetic acid at equilibrium, thestoichiometry of the reaction, and the initial number of moles ofethyl acetate, determine the moles of ethyl acetate at equilibrium.Do not include units with your answer.
8-Calculate the equilibrium constant for the system.
