When treated with hydrochloric acid, they pass into orange, and do not then give a violet, but a dull blue color, with milk of lime. The tone of color is sufficient to distinguish between colors ...

This is a color generally used in the glazing of ... and four parts of commercial hydrochloric acid ; the solution is evaporated to dryness in a water bath, the residue dissolved in water ...

Bring the solution back to its original uniform color and repeat the demonstration again ... Universal indicator is flammable and slightly toxic if ingested. Hydrochloric acid is corrosive and sodium ...

Do not attempt to perform this demonstration. Small pieces of Solid sodium metal are placed in two different concentrations of two different acids (hydrochloric acid and nitric acid). The sodium ...