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Tubes, Drying
231
Tubes, Drying
Drying Tube, Polyethylene
Straight design of see-through plastic. Endcap fittings of polypropylene accept 1⁄4" to 3⁄8" o.d. tubing.
Drying Tube, Straight
Flint glass with one bulb. Requires stopper size 00 or cork size 4.
Drying Tube, U-Shaped
Flint glass. Requires stopper size 00 or cork size 4.
Drying Tube, U-Shaped, with Sidearms
Flint glass. Requires stopper size 00 or cork size 4.
Tubes, Eudiometer
See page 87.
Tubes, Gas Measuring
Gas Measuring Tube, Borosilicate Glass
Closed at the zero end of the tube. Graduated.
Drying Tube, Polyethylene AP6520
Catalog No.
Description
Price/Each
Price/Pkg. of 12
AP6520
Polyethylene Drying Tube
$3.05
$31.32
Drying Tube, U-Shaped, with Sidearms AP1119
Catalog No.
Description
Size
Price/Each
GP7050
Straight Drying Tube
100 mm
$4.50
GP7055
150 mm
6.80
Catalog No.
Description
Size
Price/Each
AP1117
U-Shaped Drying Tube
100 mm
$7.30
AP1118
150 mm
8.05
Catalog No.
Description
Size
Price/Each
AP1119
U-Shaped Drying Tube with Sidearms
100 mm
$10.95
Drying Tube, Straight GP7050, etc.
Drying Tube, U-Shaped AP1117, etc.
Gas Measuring Tube, Borosilicate Glass GP5067, etc.
Gas Containing Moisture
Use a Drying Tube
Drying Tube
Granular Drying Agent (e.g., Calcium Chloride, Drierite®)
Dry Gas
Glass-Wool or Cotton
Glass-Wool or Cotton (to Retain Drying Agent)
Gases can be dried by passing them through a drying tube packed with a drying agent.
Catalog No.
Description
Capacity
Subdivisions
Stopper Size
Cork Size
Price/Each
GP5067
Gas Measuring Tube, Borosilicate
50 mL
0.1 mL
00
4
$20.80
GP5068
100 mL
0.2 mL
1
6
30.20
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