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Why do you leave a Bunsen burner on a luminous flame when it is not in use?
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Why should you leave a lighted Bunsen with the air hole closed?
Because if the air hole was wide open, the flame will be blue, which is going to be really hot so you have to leave it at a safety yellow flame which is when the air hole is closed when lit. It could be dangerous to leave a Bunsen burner on a blue flame. this is confusing, explain more clearly, geez is dat too much to ask?
What is the air inlet of Bunsen burner?
As you are aware, the flammable gas goes into a Bunsen Burner through the rubber tube. To burn the gas, you need oxygen, in air. By controlling the amont of air available, you vary the colour, temperature and ferocity of the flame. Te air inlet is a hole at the base of the tower. It has a collar around it which can be rotated to vary the amont of air available. If the collar is closed, no extra air is added and the only available oxygen comes from the air around the flame. With so little oxygen, the gas doesn't burn to completion and carbon soot is produced. This makes the flame yellow and clearly visible (for safety sake) but not as hot. If the collar is fully open, air is pulled in through the inlet and mixed with the gas before burning. This provdes more oxygen, a hotter flame and more complete combustion to carbon dioxide and water. This flame is blue with a roaring sound and can be almost invisible to the casual abserver. In practice, always light a Bunsen Burner with the collar closed so that you can see the yellow flame but open the collar to give ablue flame when heating. This avoids coating everything in soot. When you have finished, close the collar again to leave the flame clearly visible and yellow for everyone to see.
How is salt extracted from seawater?
If you leave the salt water in an evaporating basin the water will evaporate leaving you with big crystals of salt. To speed up the evaporating reaction you can heat it over a Bunsen Burner but your crystals of salt will the smaller.
Why is it necessary to turn off the gas with the gas cock rather than with the valve on the burner?
When you leave the gas cock open when you turn off the burner valve, and someone moves the burner to another gas port, there would be a serious gas leak until you turned off the gas at the gas cock.
What are two problems that expanding solids can cause?
hii i think that solids expand because when you heat whatever fits stright through something else you heat it on a Bunsen burner or something hot leave it for a couple of mins and then put what you have picked through the other thing then you will see that it wont go back through the other thing.....
What can you use a safety flame for?
When you have to leave your Bunsen burner but need to keep it alight.
Why do you need to know witch flame is nosier on a Bunsen burner?
so when you leave the room the bunsen is in the nosier flame (roaring flame)tells the other people that the bunsen is on and they wouldn't burn themselfs
When you are not using a Bunsen burner but wish to leave the flame on you should always leave the air hole closed why?
It is less hot
How does a yellow flame on a Bunsen burner make things black but the roaring flame doesn't?
The flame of a Bunsen burner that is yellow in color will leave a black carbon residue due to the incorrect mixture of oxygen into the flame. Because there is not enough oxygen for complete combustion, the carbon reside is left behind. When the Bunsen flame has a sufficient amount of oxygen mixed in, hence the 'roaring flame', it has a blue color and does not leave a carbon residue due to complete combustion of the acetylene gas.
Why should you leave a Bunsen burner with the air hole closed?
Because if the air hole was wide open, the flame will be blue, which is going to be really hot so you have to leave it at a safety yellow flame which is when the air hole is closed when lit. It could be dangerous to leave a Bunsen burner on a blue flame. this is confusing, explain more clearly, geez is dat too much to ask?
Why should you leave the Bunsen burner with the air hole closed?
Because if the air hole was wide open, the flame will be blue, which is going to be really hot so you have to leave it at a safety yellow flame which is when the air hole is closed when lit. It could be dangerous to leave a Bunsen burner on a blue flame. this is confusing, explain more clearly, geez is dat too much to ask?
How do you be safe using a Bunsen burner?
how to be safe using a Bunsen Burner:1. never leave the flame unattended... especially when on the blue flame.2. always wear safety glasses.3. don't heat up anything metal because they will get very hot.4. don't let young children near the Bunsen burner when it's on.5. always have someone watch it.6. turn the gas off immediately when the flame goes out.
Why should the yellow Bunsen burner flame not be used for heating?
because it isnt hot enough and will leave soot on the bottom of the thing you are heating
Why should you turn a Bunsen burner to a yellow flame if you need to leave it?
The yellow flame is more visible - making it easier for others to see. It's also a colder flame than the blue conical one.
Why should you leave a lighted Bunsen with the air hole closed?
Because if the air hole was wide open, the flame will be blue, which is going to be really hot so you have to leave it at a safety yellow flame which is when the air hole is closed when lit. It could be dangerous to leave a Bunsen burner on a blue flame. this is confusing, explain more clearly, geez is dat too much to ask?
Which flame on a Bunsen burner is used to heat chemicals?
It depends what you want to do! A blue flame is typically much hotter than a yellow flame. Sometimes you want to heat something very hot, and sometimes you want to heat something gently... and so you can choose which part of the flame best suits the purpose! blue flame
What is the function of the Gas inlet of the Bunsen burner?
The inlet valve at the bottom is used to draw oxygen in from the environment so that the flame burns more efficiant and hotter. If closed the flame will be an orange colour and will leave a sooty deposit due to the gas not oxidizeing compleately.
