Measurement Of The Spectroscopic Properties Of Benzoic Acid-Solvent Systems By Uv-Spectrophotometry

Nalan Tekin

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In this study, the dissociation properties of benzoic acid that change with temperature and concentration in the dissociation media were investigated by UV-VIS spectrophotometry. For every solution systems, the relationships between absorbance, A, and concentration, c, were obtained at different temperatures. The results were indicated that the Lambert-Beer law was obeyed in the concentration range of 1.00x10-3M to 6.25x10-5M; 1.00x10-4M to 6.25x10-6M;  1.25x10-3M  to  7.80x10-5M; 2.00x10-4M to 1.25x10-5M; 1.00x10-3M to 6.25x10-5M

for the solutions which are prepared with benzene, ethyl alcohol, n-propyl alcohol, iso-propyl alcohol and N,N- dimethylformamide; respectively. Molar absorptivities of the solutions were calculated by using the Lambert- Beer law. The temperature dependence of the molar absorptivity of each solution was determined.


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