Page 238 - Demo

Apparatus and Supplies
Tubes, Test, Accessories, continued
Wire Test Tube Racks
Heavy gauge steel. Two sizes available. 20-tube rack accepts 2 rows of 10 tubes each and is available with or without a black epoxy coating. 40-tube rack accepts 4 rows of 10 tubes each and is available with or without a black epoxy coating.
Tubes, Thistle
Thistle Tube, Glass
A useful piece of glassware for adding chemical solutions to a reac- tion vessel, such as those used in the generation of gases. Thistle tubes minimize the risk of a reaction occurring too quickly and bubbling over. When the stem of the tube is submerged, there is no risk of chemicals traveling back up to the top of the thistle tube due to pressure build-up. 300 x 40 x tube o.d. 6 mm.
Thistle Tube, Polyethylene
A safe, student-friendly, and economical method for delivering a solu- tion to your gas generator set-up. 250 x 35 x tube o.d. 6.5 mm.
Tubing Connectors
Tubing Connector, Bent, Flint Glass, 90° Angle
Tubing Connector, Straight, Polypropylene
TUBING CONNECTORS continued on next page.
1-800-452-1261
flinnsci.com
236
Catalog No.
Description
Coating
Tube Places
Holds Tube Size
Price/Each
AP1316
Wire Test Tube Racks
None
20
22 mm
$26.85
AP1317
Black Epoxy
27.80
AP1314
None
40
19 mm
25.05
AP1315
Black Epoxy
28.15
Wire Test Tube Rack, 20-Tube AP1316
Thistle Tube, Glass GP8004
Tubing Connector, Bent, Flint Glass, 90° Angle AP4592
Tubing Connector, Straight, Polypropylene AP8877, etc.
Wire Test Tube Rack, 40-Tube AP1314
Thistle Tube, Polyethylene AP8160
Catalog No.
Description
Price/Each
Price/Case
GP8004
Thistle Tube, Glass
$10.85
$123.48/12
Catalog No.
Description
Price/Each
AP8160
Thistle Tube, Polyethylene
$4.30
Gas-Generating Bottles
See page 43.
Catalog No.
Description
Fits Tubing i.d.
Length
Price/Each
AP4592
Tubing Connector, Bent, Flint Glass, 90°-Angle
3⁄16"
12"
$3.05
Catalog No.
Description
Fits Tubing i.d.
Price/Each
AP8877
Tubing Connector, Straight, Polypropylene
1⁄8"
$2.30
AP8878
3⁄16"
4.65
AP8879
1⁄4"
4.65
AP8880
3⁄8"
4.65
AP8881
1⁄2"
4.65
Set Up a Thistle Tube Gas Generator
Thistle Tube
Gas Collecting Bottle
• Discard the first bottle of hydrogen gas collected since it will contain air which, in turn, contains oxygen. Hydrogen mixed with oxygen is an explosion hazard.
• Carbon dioxide gas can be generated using the same setup with marble chips and hydrochloric acid.
• Thistle tube must always be submerged below the liquid level.
Dilute Sulfuric Acid
Zinc
Hydrogen Gas
Water
Pneumatic Trough
Water
Bottom of thistle tube must be submerged