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Bunsen Burners
The Bunsen burner was named after Robert Bunsen. It is commonly used in science laboratories. This category contains questions relating to the Bunsen burner, its use and its history.
1,143 Questions
What do we use to support glassware above a Bunsen burner?
A wire gauze is typically used to support glassware above a Bunsen burner. It helps to distribute the heat evenly and prevent direct contact between the glassware and the flame, reducing the risk of breakage.
Why did the penny turn gold when heated in the burner in the burner flame?
When a penny is heated in a flame, the copper metal reacts with oxygen in the air to form copper oxide. Copper oxide has a black color, but when it is heated at high temperatures, it can react with carbon in the flame to form a thin layer of elemental gold on the penny's surface, giving it a gold color.
Is the blue flame on the Bunsen burner called the safety flame?
No. The blue flame is called the roaring flame because it makes a sort of hissing sound, it is also not called the safety flame because it emits very little light so it is a hazard. It is a hazard because you can not see it very well so it is dangerous.
The chemical reaction for the clear blue flame on a Bunsen burner using natural gas (methane) as fuel is:
CH4 (methane) + 2O2 (oxygen) -> CO2 (carbon dioxide) + 2H2O (water) + heat and light
This reaction shows the combustion of methane in the presence of oxygen to produce carbon dioxide, water, and energy in the form of heat and light.
Who gave his name to a type of burner used in laboratories?
The Bunsen burner is named after its inventor, chemist Robert Bunsen. He developed the burner in the mid-19th century for use in chemical experiments. The Bunsen burner is commonly used in laboratories for heating, sterilizing, and combustion purposes.
Why blue flame is called roaring flame?
A blue flame can be called a roaring flame because it produces a high-temperature, steady burning reaction that is often accompanied by a roaring or whooshing sound. This intense combustion typically occurs when a gas or fuel is burning efficiently and completely, resulting in a blue color due to the high amount of oxygen present in the flame.
How do you ignite Bunsen burner?
To ignite a Bunsen burner, first ensure the air hole at the bottom is open. Then, use a striker or match to light the gas coming out of the burner. Adjust the air hole and gas flow to achieve the desired flame.
What is the energy transfer diagram of Bunsen burner?
The energy transfer diagram of a Bunsen burner shows the input energy as chemical energy from the gas source, which is transferred to heat energy through combustion in the burner. This heat energy is then transferred to the surroundings through convection, radiation, and conduction.
How does the heat move to the other end of the metal rod when placed over a Bunsen burner?
When the metal rod is placed over a Bunsen burner, heat is transferred through conduction. The molecules at the end of the rod in contact with the flame gain kinetic energy, causing them to vibrate and collide with neighboring molecules, transferring heat energy along the rod. This process continues through the rod until the opposite end reaches a higher temperature.
Why does the Bunsen burner have two flames?
The Bunsen burner has two flames because the inner blue flame is the hottest part of the flame used for heating, while the outer yellow flame provides a stable base and helps to mix in air for complete combustion. This dual flame design allows for precise control of temperature and ensures efficient burning of the fuel gas.
What is the colour of the flame of a Bunsen burner when you put sodium glutamate on it?
The flame color of a Bunsen burner with sodium glutamate is typically a bright yellow due to the presence of sodium ions in the compound. Sodium compounds are known to produce intense yellow flame colors when burned.
What equipment would be used whenMelting a crystal over a Bunsen burner?
To melt a crystal over a Bunsen burner, you would typically use a heat-resistant crucible or a ceramic dish to hold the crystal. A pair of crucible tongs would be used to handle the crucible safely while heating. It's important to ensure proper ventilation when using a Bunsen burner for melting.
What is the purpose of the desk outlet valve of a Bunsen burner?
The desk outlet valve of a Bunsen burner controls the airflow of the gas entering the burner. By adjusting this valve, you can regulate the amount of oxygen mixing with the gas, which in turn affects the type of flame produced and the temperature it can reach.
What is the amount of air mixing with gas on a Bunsen burner safety?
The amount of air mixing with gas on a Bunsen burner should be regulated to achieve the desired flame. Too little air can result in a yellow, sooty flame, while too much air can make the flame noisy and inefficient. It is recommended to adjust the air inlet to create a blue, non-luminous flame for safe and effective burning.
When do you use the violet flame on a Bunsen burner?
The violet flame on a Bunsen burner is typically used when burning methane or natural gas. It indicates complete combustion of the gas and produces the hottest flame, suitable for tasks requiring high heat such as sterilizing equipment or heating glassware for a chemical reaction.
What are 4 facts about the Bunsen Burner?
The Bunsen burner is such a familiar fixture of chemistry labs that its reputation reaches students even before they enter the classroom. As an icon of science, it permeates popular culture. But where did the Bunsen burner come from? Who invented it? You might hope to chuckle at the absurdly obvious: "why, Bunsen, of course!" But a brief foray into history may be warranted before placing too significant a wager on the "obvious."
Robert Bunsen, whose name we associate with the burner, was a 19th-century German chemist of some renown. He worked on explosive organic arsenic compounds--leading to the loss of one eye--and, later, on gases from volcanoes, geysers and blast furnaces. With Kirchoff he contributed to our understanding of the meaning of spectra lines. (He also gained note for not bathing--one woman of polite society remarked that Bunsen was so charming that she would like to kiss him, but she would have to wash him first.) Bunsen invented many bits of laboratory apparatus: the spectroscope, the carbon-pole battery, an ice calorimeter and vapor calorimeter, the thermopile, and the filter pump--but not, as one might imagine, the gas burner that bears his name. Rather, the "Bunsen" burner was developed by Bunsen's laboratory assistant, Peter Desdega. Desdega himself likely borrowed from earlier designs by Aimé Argand and Michael Faraday. So why does Bunsen get the implicit credit? --And why do we know so little about Desdega that we cannot add much to his story?
"Bunsen's" burner illustrates an important dimension of science frequently omitted in teaching about science: professional credit. Eponymous laws and labels--whose names reflect their discoverers--appear throughout science: Snell's law of refraction, Gay-Lussac's law of gases, the Hardy-Weinberg model of population genetics, the volt (named for Alexander Volta), etc. The naming of laws for their discoverers seems appropriate for honoring the scientists--and the human names are handy for reminding students that science is done by real persons. But in this system, one person and only one person gets all the credit. Focusing on great individuals can hide the collective nature of science, especially the role of technicians such as Desdega. How do we distribute the credit where appropriate?
The great Isaac Newton is frequently quoted for expressing the humbling effect of the collective effort in science: "If I have seen further," he once professed, "it is by standing on the shoulders of giants." Newton's claim, we now know, betrayed a false modesty. Newton's bitter priority dispute with Leibniz over the invention of the calculus, in particular, bears witness to his ambition and obsession with prestige--and his political maneuvers in trying to achieve it. In that case, at least, Newton tried to further his own stature "by standing on the claims of competitors." In similar ways, perhaps, the contributions of technical workers often get buried when we allow theoretical discoveries of the work of their masters to overshadow them. Bunsen's burner--or perhaps the Desdega burner--is a notable example.
The story of the Petri dish is an interesting exception--while at the same time underscoring the general pattern of invisible technicians. Julius Richard Petri (1852-1921) worked for the master of "germ theory" in Germany in the late 1800s, Robert Koch (1843-1910; pronounced as a gutteral "coke"). Initially, bacteria were cultured in liquid broth--a practice captured in our famous images of experiments on spontaneous generation. But Koch saw the advantage of growing bacteria on a solid medium instead. By spreading out mixtures of microorganisms on a solid surface, he could separate individual types in isolated colonies. With pure colonies, he could investigate the effects of each bacterium. The method allowed Koch to identify the specific organisms that cause tuberculosis, cholera, diptheria, among many other diseases--and then to develop vaccines.
What substance does Iodine test for?
Iodine is commonly used to test for the presence of starch. When iodine comes into contact with starch, it turns from its amber color to a blue-black color. This color change indicates the presence of starch.
Which elements may be excited using a Bunsen burner flame?
Metals such as sodium, potassium, calcium, and copper can be excited using a Bunsen burner flame to emit characteristic colors. This technique is commonly used in flame tests to identify different elements based on the color of light they emit when heated.
Is a Bunsen burner flame is easy to see when it is yellow or blue?
It is easier to see when it is yellow. It produces more heat energy and less light energy when it is blue. The yellow flame produces more light energy than heat energy. That makes it more visible
What lab equipments is used for melting crystal over a Bunsen burner?
A crucible and a pair of crucible tongs are commonly used to melt crystals over a Bunsen burner. The crucible is a heat-resistant container that can withstand high temperatures, while the tongs are used to handle and move the crucible safely.
Where does the gas in a Bunsen burner originate?
The gas in a Bunsen burner typically originates from a propane or natural gas source connected to the burner via a tubing system. This gas is then regulated by a control valve on the burner before being mixed with air and ignited to produce a flame for heating or sterilization purposes.
Is lighting a Bunsen burner a chemical reaction?
Yes, because a gas is burned - an oxydation reaction.
This chemical reaction produces heat as well as carbon dioxide and water vapor as products from methane and oxygen gas. The heat also excites the electrons in the gases it produces, causing them to gain energy and rapidly emit this energy in the form of photons predominately with a wavelength of approximately 475 nm, which we perceive as blue light.
The reaction can be described by the following equation:
CH4 (g) + 2 O2 (g) => CO2 (g) + 2 H2O (g)
How do you fix the poof noise that you hear when you turn the gas burner on?
To fix the "poof" noise when turning on a gas burner, check for any blockages in the burner holes and clean them with a soft brush or toothpick. Make sure the burner cap is properly seated and aligned. If the issue persists, it may indicate a problem with the gas supply or burner assembly, and it's advisable to have a professional inspect and repair it.
Why do we light a match before turning on the gas for a Bunsen burner?
We light a match before turning on the gas for a Bunsen burner to ignite the gas and create a flame. This ensures that the gas is ignited safely and prevents the buildup of gas in the air which could be dangerous if ignited suddenly.
Where is the hottest part on the safety flame on a Bunsen burner?
The hottest part of the flame on a Bunsen burner is at the tip of the inner blue cone. This part of the flame is where combustion is most complete, resulting in the highest temperature.
