The dissociation constants of weak monoprotic acids were determined with the aid of a buffer and pH meter.

Experiment # 4: Dissociation Constant Weak Acids demonstration: The dissociation constants of spineless monoprotic acids were watchd with the aid of a dampen and pH meter. Experiment: This try erupt was performed according to the procedures as provided in the chemistry 111B laboratory manual(a): Po, Henry and Senozan, N. General Chemistry Experiments Chemistry 111B, 8th Ed., 2004 Hayden-McNeil Publishing, pp 80-88. To determine the dissociation constants of weak monoprotic acids (HX and HY), a buffer was needed to set the pH meter. According to the manual, all iv resolvings to the tastes had to be carried out first before the calibration was performed. The chase materials were obtained to conduct the rive of the examine: 1) several 10-mL and 50-mL graduated cylinders to euphony the volumes of acid and base, and 2) a thermometer to record the temperature of the solution. In the first one-half of the experiment, the Ka of HX had to be used and fit(p) and in the seco nd half, the Ka of HY was utilized and ceremonious using the alike(p) procedure. In the first digress of the experiment, the pH and temperature was to be metric of a 10 mL sample of 1.02 M HA (when conducting the second half of the experiment, the concentration of HY was 1.00 M).

The second part of the experiment was to add 20 mL of 1.0 M NaA to 10 mL of 1.00 M HA, and to draw 10 to 15 mL of the solution to measure the pH and temperature. For the third part of the experiment, 10 mL of the 2 remaining buffer from part 2 was diluted with 50 mL of distilled water. The pH and temperature was measured for this par t of the experiment. The last part of the ex! periment was to mix 10 mL of... If you want to get a full essay, order it on our website: OrderCustomPaper.com

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