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Tubes, Drying
Drying Tube, Straight
Flint glass with one bulb. Requires stopper size 00 or cork size 4.
Catalog No. Description Size Price/Each
GP7050 Straight Drying Tube 100 mm $4.77
GP7055 150 mm 7.31
Drying Tube, U-Shaped
Flint glass. Requires stopper size 00 or cork size 4.
Catalog No. Description Size Price/Each
AP1117 U-Shaped Drying Tube 100 mm $8.20
AP1118 150 mm 8.91
Gas Measuring Tube,
Borosilicate Glass
GP5067, etc.
Tubes, Eudiometer See page 146.
Tubes, Gas Measuring
Gas Measuring Tube, Borosilicate Glass
Closed at the zero end of the tube. Graduated.
Catalog No. Description Capacity Subdivisions
Stopper
Size
Cork
Size Price/Each
GP5067 Gas Measuring
Tube, Borosilicate
50 mL 0.1 mL 00 4 $22.36
GP5068 100 mL 0.2 mL 1 6 33.43
Drying Tube,
Polyethylene
AP6520
Drying Tube,
U-Shaped
Drying Tube, AP1117
Straight
GP7050, etc.
Drying Tube, Polyethylene
Endcap fittings of polypropylene accept 1/4" to 3/8" o.d. tubing.
Catalog No. Description Price/Each Price/Pkg. of 12
AP6520 Polyethylene Drying Tube $3.28 $33.60
Tubes, Melting Point, Thiele
The Thiele-Dennis tube is a modified Thiele tube which improves and increases the
rate of circulation. Tube diameter is 25 mm. Economy choice melting point tube is
excellent for high school use. Tube diameter is 23 mm.
Catalog No. Description Price/Each
GP6090 Thiele-Dennis Melting Point Tube $71.66
AP6991 Melting Point Tube, Thiele, Economy Choice 15.44
S0451 Silicone Oil, 250 mL 21.12
Thiele-Dennis
Melting Point Tube
GP6090
Melting Point
Tube, Thiele
AP6991
Use a Gas Collecting Tube for
Determining Molar Volume
• Carefully invert the completely filled tube into a large container of water.
• As hydrogen gas is produced, water is displaced through the one-hole
stopper.
• Allow the reaction to proceed to completion.
• Equalize the gas pressure with the atmosphere by adjusting the height
of the tube so the water levels are the same inside and out.
1-Hole Stopper
Copper Wire,
15 cm long, caught
between the stopper and
glass tube
Coil of Mg Ribbon
3–4 cm in Cu wire “cage”
Gas Measuring
Tube, 50 mL
Water
3 M Hydrochloric
Acid, 10 mL
Hydrogen Gas
10 mL
20 mL
30 mL
40 mL
50 mL
Water
1-Hole Stopper
Use a Drying Tube
Gas Containing
Moisture
Drying Tube
Glass-Wool or Cotton
(to Retain Drying Agent)
Granular Drying Agent (e.g.,
Calcium Chloride, Drierite®)
Dry Gas
Glass-Wool or Cotton
Gases can be dried by passing them through a drying tube packed with a
drying agent.
APPARATUS TUBES, DRYING
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