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What is the answer, can you pls help me 😭😩😞😣😫😕
Kathryn Lebsack
Wiki User
∙ 14y agoIf the thing inside the test tube is not flammable, then you can use a Bunsen burner. Otherwise a hot water bath (or oil bath) is preferable to avoid risk of fire.
45 degrees is the proper position in heating a test tube:)
Wiki User
∙ 12y agofill the testube with the liquid and put in a test tube holder
light the Bunsen and adjust to the blue flame
pick up the test tube with testube clamp/tongs
hold it over the flame on a slight angle away from yourself
swirl continuously so that it heats evenly
Wiki User
∙ 8y agoMove the test tube to assure the uniformity of heating.
Work if it is necessary in a glove box.
Use protection gloves and eyewear.
Don't fill 100 % the test tube.
Not aspirate vapors.
Wiki User
∙ 9y agoTo properly heat a chemical in a test tube, hold the test tube in a clamp at a 45 degree angle away from all people. Move the bottom of the tube around in the flame continuously.
Wiki User
∙ 12y agoIn a normal lab, you would probably use a Bunsen burner, but it really depends on how fast and by how much you want the chemicals to heat up.
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What is most important part of heating a liquid in a test tube?
Heating should be slow.The test tube should not be full.Work in a laboratory hood.
What is the source of liquid droplets seen on the inner upper side of the test tube during the heating process?
Evaporated liquid from the solution (transformed in gas) or gases released by thermal decomposition and condensed in the cooler part of the test tube.
Which is the correct way to hold a test tube whike heating its unknown chemical?
When heating a test tube with any substance in it, you hold it with a test tube holder, pointed away from you and other people.
What happen when a test tube of liquid is heated improperly?
- the test tube may break- the liquid can be spread outside
Whats the best method of heating fluid in a test tube is to point the flam directly at the bottom of the tube?
FALSE!!
Heating the liquid in a test tube?
it vapourise from the test tube
What will happen to the liquid in the test tube after heating?
In my idea,it will not boil!!thats all!!
What is most important part of heating a liquid in a test tube?
Heating should be slow.The test tube should not be full.Work in a laboratory hood.
When you are heating materials in a test tube what is very important about the mouth of the test tube?
The most important aspect of heating liquids in a test tube is to never look directly into the mouth of the test tube, as liquid may spurt out and come into contact with your eyes or face. However, if you are wearing plastic safety glasses, the substance may not harm you, depending on the type of substance you are heating.
What hazards are associated with heating a liquid in a test tube that is tightly closed with a cork?
creates pressure
Give the glassware used for direct heating 0.5ml of a liquid?
This is a small test tube or a watch glass.
Consistent temperature can be achieved while heating a test tube by doing what?
Consistent temperature can be achieved by heating a test tube while moving the test tube all around the flame. Do not let only one part of the test tube rest on a flame but instead, keep moving the test tube slowly.
What is the source of liquid droplets seen on the inner upper side of the test tube during the heating process?
Evaporated liquid from the solution (transformed in gas) or gases released by thermal decomposition and condensed in the cooler part of the test tube.
When heating a liquid sample in a test tube the mouth of the test tube should be?
It depends on what you are doing, you should be sure to follow instructions carefully and be sure to take proper safety precautions
When heating liquid in a test tube what safety precautions are needed?
Before heating it, you should check the test tube for damage (scratches or cracks), and not use one that isn't perfect. You should also wear safety glasses (to protect your eyes in case the test tube explodes, which happens sometimes, even when heating water). If you are heating something that could react violently, you should use a blast shield (thick piece of clear plastic).
Why is direct heating of liquid substances in a test tube over the flame prohibited?
Provided that you use the wider kind of tube known as a boiling tube, this is not so. Of course it is dangerous to heat liquids in a narrow tube, as this can cause rapid boiling and the shooting of the liquid out of the tube.
Why is there no convection current when the liquid in the test tube is heated at the top?
because convection currents are caused by the liquid being heated, becoming less dense due to increased kinetic energy and rising. if you are heating the top of the test tube, there is nowhere for them to 'rise' to, so no current is formed, as they do not reach a place where they cool and sink to the bottom. thus convection currents are only formed when heating the bottom of a test tube.
