An alternative to halogenated solvents for halogen/halide extractions

Abstract

Authors recommend using p-xylene instead of a halogenated solvent.

The Equilibrium Constant for Bromothymol Blue: A General Chemistry Laboratory Experiment Using Spectroscopy

“…The experiment gives excellent results and offers a less expensive a and green alternative to traditional equilibrium experiments, such as the Fe(SCN) 2þ equilibrium [1][2][3][4][5] and I 2 /I 3 equilibrium. [6][7][8] The Fe(SCN) 2þ experiment uses 0.5 M nitric acid and generates heavy metal waste. The I 2 /I 3 experiment uses organic solvents or halogenated organic solvents.…”

“…It correlates well with the lecture topic of equilibrium even though the subject of the study is an acid−base indicator, bromothymol blue. The experiment gives excellent results and offers a less expensive and green alternative to traditional equilibrium experiments, such as the Fe(SCN) 2+ equilibrium − and I 2 /I 3 − equilibrium. − The Fe(SCN) 2+ experiment uses 0.5 M nitric acid and generates heavy metal waste. The I 2 /I 3 − experiment uses organic solvents or halogenated organic solvents.…”