Figure 11. Blank test bromine solution (brown), solution at room temperature (yellow), solution at 40°C (beige) and solution at 60°C (colorless) (left); red indicator paper of the solution at 60°C indicating an acidic gas (right)

From

Learning to Think in Mechanistic Alternatives: SN1 vs. E1 and the Gibbs-Helmholtz Equation

Catharina Schmitt, Lukas Kaiser, Michael Schween

World Journal of Chemical Education. 2019, 7(2), 102-108 doi:10.12691/wjce-7-2-10