Abstract
The acid-base equilibria in AN-water mixtures with decreasing content of water: 30, 10, 5 and 1%-wt., were investigated potentiometrically. It was concluded that 1%-wt. water in pure AN is enough to provide the stability of perchloric acid solutions. The perchloric acid behaves as a strong acid in the four mixed solvents. The protolysis constants of several uncharged bases were determined by means of potentiometric titration with a glass electrode. The titration conditions of bases of this type improve compared with water when the AN content increases and for the mixture with 1%-wt. water the improvement is approximately of the same order as in glacial acetic acid.
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