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Rubber stoppers inserting glass tubing

Use glycerine or a lubricant when inserting glass tubing or thermometers through rubber stoppers. Protect your hand with a paper towel or a folded cloth. [Pg.783]

F. Inserting Glass Tubing into Rubber stoppers... [Pg.25]

FIGURE F.l. Inserting glass tubing into a rubber stopper. [Pg.25]

A 1-1. pyrex three-necked flask is fitted with a separatory funnel and a horizontal drying tube attached with rubber stoppers. The drying tube containing phosphorus (V) oxide is connected in a horizontal position to a glass tube elbow inserted in a rubber stopper to allow for pressure changes. [Pg.153]

Glass cuts can be minimized by use of correct procedures (for example, that for inserting glass tubing into rubber stoppers and tubing, which is taught in introductory laboratories), through appropriate use of protective equipment, and by careful attention to manipulation. [Pg.123]

Dissolve 180 g. of commercial ammonium carbonate in 150 ml. of warm water (40-50°) in a 700 ml. flask. Cool to room temperature and add 200 ml. of concentrated ammonia solution (sp. gr. 0 88). Introduce slowly, with swirling of the contents of the flask, a solution of 50 g. of chloroacetic acid (Section 111,125) in 50 ml. of water [CAUTION do not allow chloroacetic acid to come into contact with the skin as unpleasant burns will result]. Close the flask with a solid rubber stopper and fix a thin copper wire to hold the stopper in place do not moisten the portion of the stopper in contact with the glass as this lubrication will cause the stopper to slide out of the flask. Allow the flask to stand for 24-48 hours at room temperature. Transfer the mixture to a distilling flask and distil in a closed apparatus until the volume is reduced to 100-110 ml. A convenient arrangement is to insert a drawn-out capillary tube into the flask, attach a Liebig s condenser, the lower end of which fits into a filter flask (compare Fig.//, 1) and connect the... [Pg.432]

Now fit the calcium chloride tube closely to the constricted part of the combustion tube and connect the sodium hydroxide-asbestos tube to the calcium chloride tube of the aspirator. Then remove the rubber stopper from the combustion tube, push back the stand carrying the drying apparatus so as to make more room, raise the copper block with the boat to the opening of the combustion tube, with the forceps insert the boat, push it inwards 4-5 cm. up to the furnace with a clean glass rod of suitable size, taking care not to tip the boat over, insert the rubber stopper loosely into the tube, moistening the stopper if necessary with a very thin film of glycerol,... [Pg.65]


See other pages where Rubber stoppers inserting glass tubing is mentioned: [Pg.79]    [Pg.225]    [Pg.694]    [Pg.441]    [Pg.2]    [Pg.723]    [Pg.446]    [Pg.724]    [Pg.55]    [Pg.723]    [Pg.113]    [Pg.724]    [Pg.150]    [Pg.207]    [Pg.72]    [Pg.188]    [Pg.2]    [Pg.25]    [Pg.128]    [Pg.166]    [Pg.295]    [Pg.514]    [Pg.534]    [Pg.550]    [Pg.348]    [Pg.66]    [Pg.89]    [Pg.603]    [Pg.56]    [Pg.10]    [Pg.91]    [Pg.269]    [Pg.23]    [Pg.66]    [Pg.432]    [Pg.559]    [Pg.3]    [Pg.41]    [Pg.57]    [Pg.58]    [Pg.62]    [Pg.204]   
See also in sourсe #XX -- [ Pg.56 ]




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F Inserting Glass Tubing into Rubber Stoppers

Glass tubes

Glass tubing

Glass-rubber

Rubber stoppers

Rubber tubing

Stoppering

Stoppers

Tube inserts

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