Dear Friends, I need a typical simple reaction to teach the students something other than the liquid reaction of caustic soda and ethyl acetate. I need to change to other reaction but use pH as a sensor if possible.
There are couple of reactions other than the one you already have, which can be studied in Lab to demonstrate the titration process:
Titration #1 : Hydrochloric acid, HCl, with sodium hydroxide, NaOH.
Titration #2: Standardization of NaOH: Potassium Hydrogen Phthalate, KHP, with sodium hydroxide, NaOH.
Titration #3: Hydrochloric acid, HCl, with ammonium hydroxide, NH4OH.
Titration #4: Acetic acid, CH3COOH with ammonium hydroxide, NH4OH
I think titration reaction is a typical reaction for chemical reaction engineering lab?
Titration reaction is one such reactions you could use to illustrate to students in chemical engineering lab. It is also encouraged that you vary the reactants concentration to give your students more insight.
Titrations hardly seem suitable for investigation in a chemical engineering lab, a chemistry lab, maybe, but not a chemical engineering lab. In a chemical engineering lab you want to study kinetics. With the ethyl acetate, sodium hydroxide, reaction you are actually studying the rate of hydrolysis of ethyl acetate to acetic acid and ethanol. To slightly vary the reaction, substitute other esters such as n-propyl acetate, isopropyl acetate or ethyl propionate. If you want to go a little further afield, try studying the hydrolysis of urea in sulfuric acid making carbon dioxide and ammonium sulfate solution. The urea reaction requires elevated temperature and temperature is another variable that you should study.
Thanks Prof. Brown for your nice answer, this what I need, I know how to demonstrate the titration in chemistry but need something for chemical engineering as you stated.
All the titration reactions stated above can also be used to study chemical kinetics if the concentration is measured with time [ dc/dt = -kC^n]. A aq. solution of base can be added to the acidic solution with constant stirring. Periodically, a sample may be collected in a pipette and can be titrated to determine the residual acid concentration. With time, you get a decay trend of acid concentration [C vs t]. Then using differential analysis, you can find both the order of reaction (n) and kinetic constant k.
Fischer troops is simple and typical, a good choice for starting specially for numerical modeling,
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