Abstract
The neutralization of CH 3COOH by NaOH in water has been studied by the mass spectrometric analysis of clusters generated via fragmentation of liquid droplets. In water, CH 3COOH molecules form self-association clusters at higher acid concentrations like the molar ratio of CH 3COOH:H 2O=1:10. At these concentrations, the neutralization takes place via interaction between the CH 3COOH clusters and NaOH to afford Na +(CH 3COOH) a(CH 3COONa) b clusters. Furthermore, Na + is preferentially solvated by CH 3COOH in water to form Na +(CH 3COOH) α clusters. In consideration with these cluster structure, the reaction mechanism in solution can be realized more precisely.
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