Make HydroBromic Acid Video Clips.
How to make HydroBromic Acid. Potassium bromide (240g.) is dissolved in water (400ml.) in a beaker, and the beaker is cooled in ice or in a bath of cold water. Concentrated sulphuric acid (180ml.) is then slowly added. Care must be taken that the temperature does not rise above 75 degrees otherwise a little bromine may be formed. The solution is cooled to room temperature and the potassium bisulphate, which has separated, is removed by filtration through a hardened filter paper in a Buchner funnel. The filtrate is distilled from a litre distilling flask, and the fraction bp 124-127 is collected; this contains traces of sulphate. Pure constant boiling point hydrobromic acid is obtained by redistillation from a little barium bromide. The yield is about 285g. or 85%. of the theoretical.
Keywords: acid, hydrobromic Acid, Potassium bromide, myst, 32, YT
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