Bending tubing glass

Tube Bending. To bend a glass le for i tube, heat a part of it about five... 

Beckmann rearrangement, 729, 741 Bending of glass tubing, 57 Beilstein s Handbuch, U15-1126 Beils tein s test, 289 ... 

Follow this procedure Mix cup of water with 1 teaspoonful of sucrose. Mix cup of water with 1 teaspoonful of sodium chloride. Mix cup of warm water with 1 teaspoonful of copper sulfate crystals. Note the color of the third solution. Now pour all three solutions into the pyrex flask. Arrange the apparatus as the diagram shows. You will have to bend the glass tubing in two places. Put some ice cubes into the pot or bowl and add some water. This will keep the temperature at a more constant level. Then put the pint jar into the bowl. Place the alcohol burner under the flask, and bring the mixture to a slow boil. 

II.l INTRODUCTION Before the student attempts to carry out the analytical reactions of the various cations and anions detailed in Chapters III and IV, he should be familiar with the operations commonly employed in qualitative analysis, that is with the laboratory technique involved. It is assumed that the student has had some training in elementary practical chemistry he should be familiar with such operations as solution, evaporation, crystallization, distillation, precipitation, filtration, decantation, bending of glass tubes, preparation of ignition tubes, boring of corks, and construction of a wash bottle. These will therefore be either very briefly discussed or not described at all in the following pages. 

Experiment 2. — Bend a glass tube, about 35 centimeters long and 5 millimeters in external diameter, into a double right angle, so that each arm is about 10 centimeters long. See Fig. 10. Preserve this tube, as it is used in many experiments. 

Experiment 3. — Bend a glass tube, 40 to 45 centimeters long, into the shape shown in Fig. ii. The numbers indicate the approximate length of the different portions. The shorter arm is made by holding... 

FIGURE 1.4. Flame for bending soft glass tubing. 

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