A buffer is prepared by mixing 44.2 mL of 0.209 M NaOH with 141.2 mL of 0.231 M acetic acid. What is the pH of this buffer? (The pKa for acetic acid is 4.75.) What is the dissociation constant of acetic acid? The pH of a 0.10 M HOBr solution is 4.8. What is the value of pK...
Finally, solutions were titrated with standardized NaOH solution until the color changed from red to blue. EP volume was used for the calculation of acetic acid concentration. Measurements were performed in triplicate. 3. Results and discussion 3.1. Optimization of PAD-based sensing 3.1.1. Color ...
(7.5 mg/mL in 50 mMsodium phosphatepH 7.3) was titrated to pH 10 with 5.0 M NaOH and allowed to stand atroom temperaturefor 3 hr. The pH was then adjusted to 7.12 with 1.0 M HCl, and the PEG removed by dialysis against 50 mM sodium phosphate buffer for 72 hr. The second ...
A certain mixture ofHClandCH3−COOHis0.1Min each of the acids.20mlof this solution is titrated against0.1MNaOH. By how many units does thepHchange from the start to the stage when theHClis almost completely neutralised and acidic acid remains unreacted?Kafor acetic acid=2×10−5. ...