Hydrogen sulfide, apparatus for

See also Hydriodic. acid) Hydrogen selenide, 2 183, 184 Hydrogen sulfide, apparatus for treating solutions with, 3 15 liquid, 1 111 purification of, 3 14... 

Chemists use whatever tools they can find in their laboratories to take full advantage of the properties of acids and bases. One tool they use is Kipp s apparatus, a piece of laboratory equipment that relies on acid-base chemistry to do its job. Named for its inventor, Dutch pharmacist Petrus Johannes Kipp (1808-1864), Kipp s apparatus (or gas generator) is especially useful for creating gases, such as carbon dioxide, hydrogen, or hydrogen sulfide, that the chemists can then use in other chemical reactions. 

Figure 5.1 Made with three connected glass bowls, Kipp s apparatus relies on acid-base chemistry in order to produce gasses—such as carbon dioxide, hydrogen, or hydrogen sulfide—for chemists to use in other chemical reactions.

Puacz et al. (1995) developed a catalytic method, based on the iodine-azide reaction, for the determination of hydrogen sulfide in human whole blood. The method involves the generation of hydrogen sulfide in an evolution-absorption apparatus. In addition, the method allows for the determination of sulfide in blood without interference from other sulfur compounds in blood. A detection limit of 4 g/dm3 and a percent recovery of 98-102% were achieved. Although the accuracy and precision of the catalytic method are comparable to those of the ion-selective electrode method, the catalytic method is simpler, faster, and would be advantageous in serial analysis. 

Iron(II) sulfide occurs in nature as the minerals magnetkies, troilhte and pyrrhotine. The most important application of this compound is in Kipp s apparatus as a source for laboratory preparation of hydrogen sulfide. It also is used in paints, pigments, and ceramics and lubricant coatings. 

SET UP APPARATUS FOR MAKING HYDROGEN SULFIDE [SEE PAGE 53). POUR SOLUTION OF MnClj INTO TEST TUBE. DILUTE IT IF NECESSARY. LEAD H,S INTO IT. YOU GET MANGANESE SULFIDE. 

For spills of aqueous solutions of sodium sulfide, wear nitrile rubber gloves, laboratory coat, and eye protection. If there is any risk of hydrogen sulfide being formed, a self-contained breathing apparatus is necessary. Cover the spill with a 1 1 1 mixture of sodium carbonate, clay cat litter (calcium bentonite), and sand. When all of the liquid has been absorbed, scoop the mixture into a plastic pail and place in the fume hood. Add sufficient 1% aqueous sodium hydroxide solution to dissolve the sodium carbonate in the spill mix and to ensure that the liquid is basic. Estimate the volume of sodium sulfide solution that was spilled and add 175 mL of household chlorine bleach containing 5.25% sodium hypochlorite for each 10 mL of commercial sodium sulfide solution (commercial sodium sulfide solution is about 20% this volume of bleach allows a 25% excess). Allow the mixture to stand in the fume hood overnight and decant the liquid into the drain. Dispose of the solid (sand and calcium bentonite) in the normal refuse.6... 

Figure 031. Apparatus for the preparation of hydrogen sulfide gas Hydroxylamine hydrochloride. Oxammonium hydrochloride...

Figure 7 26- Pulse reactor apparatus for poison litration measurements using hydrogen sulfide.

The apparatus is shown in Fig. 8. A T-tube A for blending nitrogen and hydrogen sulfide is attached to a drying... 

Benzophenone anil (7 g) is dissolved in benzene (50 ml) in a hydrogenation vessel and treated with dry hydrogen chloride, which precipitates the yellow hydrochloride. The hydrogen chloride is then replaced by hydrogen sulfide, and the vessel is shaken for 6 days under the pressure from a Kipps apparatus. The resulting deep blue solution is filtered under carbon dioxide from the precipitated aniline hydrochloride and unchanged benzophenone anil hydrochloride, the benzene is evaporated in a stream of carbon dioxide, and the residue is fractionated. Thiobenzophenone (3 g) distils at 176-178°/18 mm as a deep blue oil, which solidifies on cooling but remelts in the warmth of a hand. 

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