ApchemWiki | RecentChanges | Preferences
MATERIALS NEEDED TO PROPERLY USE A TEST TUBE
-Test Tube Rack: Never leave a test tube on a counter. Always obtain a test tube rack before moving test tubes to your lab station.
-Test Tube Holder: This instrument is only necesary when heating a test tube. Never touch a hot test tube. Always use test tube holders.
-Glass Stirrer: Use a small glass stirrer to mix solutions in test tubes and always wash the stirrer before and after using it.
-Never carry more than one test tube in each hand!
-Never use stoppers!
MASSING A TEST TUBE
-Before making initial measurements, wash out test tube using DI water and dry out completely.
-Place the test tube in the notch of the tray on the balance to make sure it does not move and elevate the top of the test tube.
HEATING WITH A TEST TUBE
-When heating a solution or liquid, always use a hotwater bath unless otherwise instructed.
-When heating a solid, use a Bunsen Burner.
-To use hot water bath, place a large beaker of water either on a hot plate or over a Bunsen Burner.
-Insert test tube in hot water bath with test tube holders attached.
-To heat over a Bunsen Burner, hold the test tube over the flame using the test tube holders until the substance is dry.
PUTTING SOLUTIONS IN A TEST TUBE
-Unless otherwise directed, measure and pour the solution in a graduated cylinder.
-To mix solutions, stir using a small glass stirrer or swirl the liquid within the test tube.
-If a test tube breaks, inform your teacher and place it in the prper recepticle.
-When finished, clean test tube and hand on test tube rack.
WorkSheet
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