Rise in the pH of an unfrozen solution in ice due to the presence of NaCl and promotion of decomposition of gallic acids owing to a change in the pH.

摘要: Oxidative decomposition of gallic acid occurs in alkaline solutions but hardly arises acidic solutions. We have found that the addition sodium chloride promotes caused by freezing even under neutral and conditions. Even at pH 4.5, was decomposed presence NaCl; however, absence NaCl, it lower than 7. Chloride ions are more easily incorporated ice when NaCl solution is frozen. The unfrozen becomes positively charged, as a result, protons transfer from to ice. measured which coexists with single-crystal formed 5 mmol dm-3 determined be 8.6 equilibrium CO2 380 ppm or 11.3 compared 5.6 original solution. From model calculation performed for ...