High School Chemistry . 9. Prepare hydrogen gas, using the apparatus Fig. 8and putting into it granulatedzinc and hydrochloric the gas through a tubecontaining fragments of calcicchloride, for the purpose ofdrying the gas ; and, throughthe cork which should tightlyfit the end of this tube, passa glass tube drawn to a fine ^*- ^- point. After all air has escaped apply a lighted match to the gas-jet. 10. Introduce a piece of fineiron or steel wire into the the effect of the flameon platinum wire and copperwire. 11. The Chemical Harmoni-cum.—Bring down over the jet atube about
High School Chemistry . 9. Prepare hydrogen gas, using the apparatus Fig. 8and putting into it granulatedzinc and hydrochloric the gas through a tubecontaining fragments of calcicchloride, for the purpose ofdrying the gas ; and, throughthe cork which should tightlyfit the end of this tube, passa glass tube drawn to a fine ^*- ^- point. After all air has escaped apply a lighted match to the gas-jet. 10. Introduce a piece of fineiron or steel wire into the the effect of the flameon platinum wire and copperwire. 11. The Chemical Harmoni-cum.—Bring down over the jet atube about 4 centimetres wideand 40 or 50 centimetres long,as in Fig. 9. Use tubes of dif-ferent diameters and differentlengths, and move them slowlyup and down. 12. Invert a long, dry, wide-mouthed bottle or bell-jar overthe jet. 13. Have a vessel made out of tin or sheet copper inthe form of a double cone, as in Fig. 10. At one end,B, have a neck for a cork, and at the other end, A, a. Fio. 9. 28 HYDROGEN. small opening about one-eighth of an inch in vessel should be about five inches longand two and a half inches wide in themiddle. Pass a hydrogen delivery tubein through B until the air and hydrogenbecome well mixed (or fill the vesselwith oxygen and hydrogen mixed in ajar), then close B tightly with a corkand hold the end A to a flame. Holdthe apparatus so that when the cork blows out no one will be struck.
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