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To let air go thru

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Q: What is the hole in the rubber stopper for?
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When magnesium reacts quickly with hydrochloric acis to produce hydrogen gas in a glass tube with a rubber stopper why would the rubber stopper burst of?

rubber stopper burst up because it has strong afinity with hydrogen


What is the use of beaker cover?

A beaker cover is called a rubber stopper or metal stopper(depends on what the stopper is made of).


Why are the tubes sealed with rubber stopper rather than left open?

To avoid loss of substances.


What is the function of a rubber bung?

A rubber bung (also called rubber stopper) is used in the laboratories for test tubes, flasks (made of glass usually). Bungs also used by winery industry for the wine bottles. A bung must fill well as a stopper. The bungs are of many sizes. Rubber bung can have one or more hole(s) for plugging in tube depending on the specification of the procedures. In chemical laboratory, to prevent the liquid chemical leaks or escape the container, we need the rubber bung that fit tightly to the container's open, therefore, the dimension of the rubber bung is concerned. These are some of the sizes that are commonly seen in chemical laboratory


Why should be cork and glass tubing be moistened with water and glycerin respectively?

I have no idea what you are really talking about exactly, but I assume you are referring to using water to lubricate a glass tube before trying to push it through a rubber stopper with a hole in it. The water will help the glass slide through the small rubber opening, which can be sticky otherwise.

Related questions

I have a beautiful glass globe hummingbird feeder that has a rubber stopper. How can I stop the nectar from leaking out of the stopper?

If there is debris on the stopper it might be preventing a good seal. Try removing the rubber stopper and wipe it off to remove any debris that might be on it. Clean out the hole that the stopper goes into as well. This will help ensure a clean seal between the hole and the stopper. Put the stopper back into the hole, making sure it is a tight fit. If it still leaks you may need to buy a new stopper.


Which hole does the rubber stopper go in inside the carb of 1986 Honda fourtrax fourwheeler?

Just sso happens I tore into my carb today and the rubber stopper goes 2nd hole.... outside in .....towards the main jet


What is the device used to bore holes through cork or rubber stopper?

Plug Hole I Think :)


Where can you buy a rubber stopper?

You can buy an rubber stopper at widget-co.com. They are not that expansive ethier


Toyota Previa oil light on but full of oil?

Try changing the oil pressure switch. now, where is the oil pressure switch? on the dash next to the trip odometer switch is a rubber stopper or a hole that leads into the dash. push a pen into the hole(remove rubber stopper) and depress the button in there. this is to be done after every oil change.


When magnesium reacts quickly with hydrochloric acis to produce hydrogen gas in a glass tube with a rubber stopper why would the rubber stopper burst of?

rubber stopper burst up because it has strong afinity with hydrogen


Would a rubber stopper float in water?

i don't know... That's why I'm asking you. soo.. Does a rubber stopper float in water?


When a rubber stopper has a mass of 8.46g was immersed in a graduated cylinder containing 25 ml of water the water rose to 30.9 ml Calculate the densityof the rubber stopper?

Since the difference in volume corresponds to the volume of the stopper, the volume of the stopper=30.9-25=5.9ml Thus density of the rubber stopper=mass/vol=(8.46/5.9)g/ml


Why is it important to touch a charged object to the metal rod of an electroscope and not to the rubber stopper?

it is important because if you don't and touch the rubber stopper it will not show if it is positive.


What is the average life expectancy of a rubber stopper?

This is very variable and depends on: - type of rubber - temperature - pressure on the stopper - the liquid in contact - other conditions of use


What is the use of rubber stopper in laboratory apparatus?

pantakip.


What is the use of rubber stopper's laboratory apparatus?

pantakip.