Sulphites give with barium chloride a precipitate soluble in hydrochloric acid.
Wash well the precipitate until it no longer gives a precipitate with barium chloride.
Black soluble prisms, formed by decomposing silver permanganate by means of barium chloride, and cautiously evaporating.
barium chloride renders the recovery incomplete: but tetanisation temporarily removes the induced sluggishness.
Preparation: 100 grams of barium chloride are dissolved in one liter of distilled water and filtered.
It should not be precipitated by barium chloride, and especially by soluble sulphates.
A mixture of equal parts of cryolite and barium chloride is very good in soldering bronze or aluminum alloys.
The gelatine is allowed to swell in the water, and, by the aid of heat, is dissolved; the barium chloride is then added.
Caffein aids the action of nitrates, acetanilid, ethyl alcohol and amyl alcohol, and increases the toxicity of barium chloride.
If sulphuric acid is present it must be separated by treating the solution of the compound with barium chloride and filtering.
