A thistle tube is a piece of laboratory glassware consisting mostly of a shaft of tube, with a reservoir and funnel-like section at the top. Thistle tubes are typically used by chemists to add liquid to an existing system of apparatus. Image File history File links Thistle Tube Description: Thistle Tube. ... Laboratory glassware refers to a variety of equipment, traditionally made of glass, used for scientific experiments in chemistry and biology. ... A funnel is a conically shaped pipe, employed as a device to channel liquid or fine-grained substances into containers with a small opening. ... Look up chemist on Wiktionary, the free dictionary. ...
The thistle tube shaft is designed to allow insertion through a small hole present in some stoppers, permitting the tube to be inserted into a flask, such as an erlenmeyer flask. A stopper is a truncated conical piece of rubber or cork used to close off a glass tube, piece of laboratory glassware, a wine bottle or barrel and other containers with orifices. ... Erlenmeyer flasks from the Argonne National Laboratory glassblowing shop. ... Erlenmeyer flasks from the Argonne National Laboratory glassblowing shop. ...
In case you are wondering the thistletube is the tube with a bulb-like opening at the top in the attachment.
Clearly, if your thistletube were not below the surface of the liquid in the beaker, any gas generated by your reaction would simply exit the beaker through the open tube to the atmosphere.
With the Thistletube below the surface of the acid, once the pressure in the beaker is greater then atmospheric, the gas will displace water in the collection beaker.
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