The Determination Of The Properties Of Acids And Bases Using The Acetic Acid And Sodium Acetate Buffer System
824 Words Nov 1st, 2016 4 Pages
The purpose of this experiment was to explore some of the properties of the acetic acid and sodium acetate buffer system, such as the greatest buffering capacity and the acid and base neutralization ability of several different concentrations of this buffer.
The reagents used were the following: 0.10 M acetic acid, 0.010 M acetic acid, 0.60 M acetic acid, 0.60 M sodium acetate, 0.10 M sodium acetate, 0.010 M sodium acetate, 0.40 M HCl, 0.40 M NaOH, 10 mL H2O, 20 drops of thymol blue, and 10 drops of bromothymol blue.
There were no unusual apparatus used in this experiment.
C2H4O2(aq) + H2O(l) C2H3O-(aq) + H3O-(aq)
CH3COONa(aq) + H20(l) CH3COOH-(aq) + NAOH(aq)
HCl(aq) + H2O(l) → H3O+(aq) + Cl-(aq)
NaOH(aq) + HC2H3O2(aq) H2O(l) + NaC2H3O2(aq)
HCl(aq) + NaC2H3O2(aq) HC2H3O2(aq) + NaCl(aq)
The same procedure was followed as the one described in the laboratory protocol.
Data, Observation, and Results
Overall, the results of the experiment show that the buffering capacity increases as the concentration of the acetate buffer system (concentration of acetic acid and sodium acetate) increases. Tables 1 and 2 show values for the solutions (acetic acid and sodium acetate) that were made in week 1 of the experiment. They also state the precise concentration of the final solution based on the precise…