Potassium carbonate solutions specific gravity

Table LI.—Specific Gravities op Solutions op Potassium Carbonate (15°).

Oxides of Nitrogen. To determine their concentration, 0.01 A potassium permanganate and sulfuric acid (specific gravity 1.84 at 15.6° C.) are required. A 0.005A sodium carbonate solution containing 0.1 mole of potassium permanganate (11) is used as an absorbant for oxides of nitrogen. 

Allyl alcohol begins to distil already at H)5 G. tire distillation continues to 2(i0 0., and simultaneously there also passes over acrolein from the direct decomposition of the glycerine itself.. In order to ol jtain the allyl alcohol in a pure state, one shakes the raw distillate with a solution of potassium carbonate, whereby water and allyl formate are removed the liqnid separated from the potassium carl)onato solution is washed with, solid alkali, whereby the acrolein is removed. After rectification at. )() to. 1.00" G, drying with, caustic baryta, aud rc-])cated distillation, one obtains finally pure allyl al-coh,ol as a colourless liquid, with a biting disagreeable smell, low specific gravity (0-8.5K), and a Iwiling-point of .ur C. 

---