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April 23, 2014

Search: Flame Colors - Chemistry

Number of results: 292

Chemistry
Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution with more than one ...
Thursday, July 10, 2008 at 1:58am by Chu

Chemistry
Regarding Flame Tests, why do you have to subject the sample to a flame? Which part of the Bunsen Burner is hottest? Why is it necessary to hold the loop in this part of the flame? What do you think will happen if you perform the flame test on a solution with more than one ...
Thursday, July 10, 2008 at 1:58am by Chu

chemistry -------------chemistry
If a flame on the candle burns red , how does energy of that flame compare to that of the Bunsen burner flame ? and why ? ans:The Bunsen burner flame has higher temperature than candle’s flame . Because flame of candle emit red ,and red has the least energy in visible light.
Thursday, October 11, 2012 at 12:55am by Maria

Chemistry -Flame colors (check+help)
What are the characteristic flame color for sodium, potassium, barium, copper, strontium, and calcium? Explain why? Ans: i know the flame colours, but for the explain why, could the below be a possible answer? The characteristic flame color is due to the shift in the energy ...
Monday, February 14, 2011 at 3:26am by Farah

physics
Yes, it emits a bluish light, but not very much. You should be able to see the flame with the lights out. The light is emitted mostly by unstable C2 and CN molecules in the reaction zone. Those species disappear above the flame. If you do not premix the air with the gas below ...
Thursday, January 5, 2012 at 3:39am by drwls

Chemistry
1. A flame heats the sample and may produce a flame color that helps us detect the presence of a certain element. Some elements cause the flame to glow a certain color which tells us that element is present in the sample. For example, a very bright yellow-orange flame color ...
Thursday, July 10, 2008 at 1:58am by GK

Physics
Suppose a flame of a gas burner stove emits light just like a blackbody.The flame appears blue,emiting most of the light as a wave length of 475 nanometers. what is the temperature of the flame. How do I solve this?
Friday, October 21, 2011 at 3:11pm by EBS123

Flame Colors - Chemistry
I've searched the internet but I can't find out what color flame a Nickel (or even better NiSO_4) solution will produce when burned. As well, does Aluminum (Al(SO_4)_3 ) have a flame color from the flame test? Don't know sorry!Wih I could help!Can you help me though? Thanks ...
Monday, November 6, 2006 at 8:11pm by J.M.

Chemistry
Hii! I have a question: So the flame photometer uses a natural gas flame (1800 oC), what if it uses acetylene - nitrous oxide flame which is ~3000 oC, what would happen to the emission intensities? Thanks!
Monday, August 16, 2010 at 12:49am by Anonymous

Clinical Chemistry
Thank you... Any ideas on ISE vs. flame photometry? I was thinking that maybe flame photometry comes out consistently slightly lower because it is hard to standardize? I mean, its hard to get the exact temperature of the flame to be precise (and accurate)?
Tuesday, April 9, 2013 at 8:57pm by Jesse

chemistry
when you hold a hydrogen filled pipet bulb horizontally with its mouth about 1 cm from a falme while gently squeezing what would you observe? a. the flame goes out b. a gentle pop and the flame may have been blown out c. the flame got bigger d. nothing happened I think that ...
Monday, May 10, 2010 at 9:24pm by grace

Chemistry
There's a test tube filled with a gas, and you bring a flame to the mouth of the tube. Many things could happen... The flame might get snuffed out and there might be a popping sound... so how can you find the density of that gas in relation to the air around it using the ...
Sunday, October 21, 2007 at 1:30pm by amaliyah

chemistry
what are the advantages of using a blue flame instead of a yellow flame for heating objects on a bunsen burner?
Friday, February 15, 2008 at 4:55pm by ss

ENERGY
When a candle is lit? The wick burns, and vaporizes paraffin (wax) below it. The paraffin vapor also burns as it mixes with air outside the yellow flame. The light comes mostly from carbon particles inside the flame, which have not burned yet. They burn up later as they pass ...
Wednesday, March 12, 2008 at 12:39pm by drwls

Physics
I had posted this question once before, but no one helped me on this one. So Iam posting this question again. Suppose the flame of a gas burner stove emits light just like a blackbody. The flame appears blue emiting most of the light at a wave length of 475 nanometers. What is...
Friday, October 21, 2011 at 3:07pm by KatieSc

chemistry
The flame color will be visible as a reddish violet color. The blue glass, typically a cobalt blue glass, will filter out extraneous colors, such as the intense yellow color of a sodium flame. The intense yellow color of the sodium flame will mask the potassium flame unless ...
Saturday, June 14, 2008 at 3:32am by DrBob 222

chemistry
DrBob222 is wrong.potassium burns with lilac flame when react with water.(of cuz if the reaction is too small,lilac flame is difficult to be observed)
Wednesday, October 13, 2010 at 1:33pm by Kon

chemistry
Neither nitrate ion nor chloride ion impart a color to a flame in the flame test; however, nitrates and chlorides are easier to volatilize.
Sunday, September 12, 2010 at 11:08pm by DrBob222

inorganic chermistry
(a)explain why the colour for ions in the flame tests differ (b)Why do the chemicals have to be heated in the flame first before the colour light is emitted?
Friday, October 1, 2010 at 3:03pm by kabelo

engineering
I need help with my Fire Engineering homework. What is the heat release rate of a flame measuring five feet in height assuming the flame is in the center of a room?
Friday, November 4, 2011 at 5:31pm by Deborah

astronomy
on a domestic gas cooker the temperture in the hottest part of the flame is about 2200k.if salty eater is spilled in the flame then it becomes yellow-orange.measurements with a spectrometer show the presence of an emission line at 589n. 1) the solar spectrum shows an ...
Monday, March 3, 2008 at 4:11pm by amy21

Chemistry
Light blue flame inside a Dark blue flame
Tuesday, October 13, 2009 at 9:08pm by Kate

physics
Suppose the fame of a gas burner stove emits light just like a blackbody. The flame appears blue,emiting most of its light at a wave lengh of 475nanometers. what is the temperature of the flame? How do I solve this?
Wednesday, October 19, 2011 at 2:29pm by KatieSc

Burning Candle experiment
It looks somewhat a flame to me, too. The wax either burns in the flame, producing CO2 and H2O or it drips down the side of the candle instead of burning.
Thursday, April 1, 2010 at 11:18pm by DrBob222

Chemistry
What adjustment would you make to the Bunsen burner (a) to correct a flame with an orange tip (b) to correct a ragged, noisy flame? ..I always get the purpose of the gas inlet / air inlet mixed up
Wednesday, January 19, 2011 at 9:12pm by John

physics
You can comfortably hold your fingers close beside a candle flame, but not very close above the flame. Why? In a still room, smoke from a candle will sometimes rise only so far, not reaching the ceiling. Explain why.
Wednesday, January 30, 2008 at 7:35pm by HELP!

science
I put a peice of copper into a flame and I need to write a word equation for it. Whats a flame made up of cause I wanna write copper + _____ -> _______ + ________ I know its a synthesis reaction.
Monday, October 6, 2008 at 9:35pm by Lena

Burning Candle experiment
what is the shape of the candle flame? To me it looks kind of like a leaf--more like a teardrop. Am I correct? where does the wax from the candle go? Does it just burn in the flame?
Thursday, April 1, 2010 at 11:18pm by Sara

Chemistry
Frankly, I think the nitrate ion has little to do with it other than helping the salt volatilize in the flame. Generally, chlorides or nitrates are used for the flame tests of these cations and its done because those salts volatilize a little easier than some of th others.
Tuesday, December 16, 2008 at 8:34pm by DrBob222

physics
Find the heat flux due to radiation from a gasoline pool fire whose flame is 3 m tall with a 1 m diameter, and it is 3.5 m away from a target fuel. Assume e = 0.98 with a flame temperature of 1,300 K. Solve this problem by determining the configuration factor and assume a ...
Sunday, November 4, 2012 at 1:00pm by doris

Chemistry
It depends upon what atomic or ionic lines the photometer is looking at, and what is added to the flame. Generally speaking, a hotter flame will be brighter, but not at all wavelengths. Ion lines will tend to be favored over neutral atomic lines at higher temperature.
Monday, August 16, 2010 at 12:49am by drwls

CHEMISTRY
I don't think it's a matter of which ions are excited versus those that are not as much as it is the color. Atoms/ions that are used in flame emission are there primarily for three reasons: 1. They are easily volatilized in a flame and 2. They emit energy that places the ...
Sunday, October 27, 2013 at 1:41pm by DrBob222

Chemistry
We did a flame test today to see what substances produce what colors when burned. Can you please explain... Why each of the different elements have a different atomic emission spectrum? Would the flame tests be useful for detecting individual elements present in a mixture of ...
Tuesday, September 17, 2013 at 8:52pm by Sarah

organic chem
It depends upon what you are using for the source of heat. If you are using an electrical system, such as a heating mantle, then its done with a rheostat. Using an open flame you would decrease the flame, etc. These are guesses since you don't specify a heating source.
Saturday, December 1, 2007 at 5:10pm by DrBob222

English
4) definitely ON the main streete supermarket at 23 of the main street? (a bit strange that I know the number of the building, but do not know the name of the street. 5) not law flame but LOW flame 6) a vegetable soup OR just: prepares vegetable soup Everything else IS fine. Sra
Tuesday, February 1, 2011 at 5:06pm by SraJMcGin

Science
Does anyone have the spectra for sulfur? In class we did this using a flame test, where we put the sulfur in a flame over a bunsen burner and used a spectra scope to find sulfur's spectra, but I seem to have lost this data. I've been looking on the web, but I don't know which ...
Tuesday, May 27, 2008 at 6:19pm by Maddie

chemistry ................chemistry
A mixture of Na and K give a yellow color in the flame. The Na yellow flame completely blocks the violet from K. Using a Cobalt glass filters the yellow out and leaves a reddish color for K. Did you not see this when you did the experiment?
Sunday, October 14, 2012 at 8:47pm by DrBob222

Chemistry
Probably KCl. The purple flame is indicative of potassium; however, my experience is it is not an intense purple flame but a light colored violet and somewhat fleeting when it appears. The AgNO3 test is indicative of chloride ion. However, both tests should be confirmed. A ...
Wednesday, September 29, 2010 at 1:23pm by DrBob222

English
what the purpose of the olympic torch/flame? The purpose of the olympic torch/flame is to give everyone the strength to protect themselves from danger and help struggle for victory. Can someone please give me a better purpose than this. I tried to fit these words in my answer...
Tuesday, February 16, 2010 at 8:47pm by Sara

sand bath (chem)
A sand bath offers an even heat over the area instead of hot spots that might be brought on by using hot coils or an open flame. Also, there are some things you don't want to heat with an open flame.
Sunday, October 21, 2007 at 7:31pm by DrBob222

chemistry
we are doing about the flame test. we are using some metals like barium chloride,calcium chloride,copper,lithium,opotassium sodium and strontium. the flame of Colors are yellow-orange,red- orange,green-blue,red,pink,orange and red.We had to guess wat color is going to be?
Tuesday, October 19, 2010 at 8:25pm by Kassandra

Honors Chemistry
We did a lab in class on Friday where we stuck a metal loop in various chemicals and stuck it in the flame of a Bunsen burner and we observed the flame's colors as the different metals went in. For every lab we do, we have to write a writeup which involves a graph. How could I...
Sunday, September 20, 2009 at 11:36pm by Emily

science
It isn't the flame that is reacting with Cu. Its the air. The flame simply raises the temperature to make the reaction with oxygen of the air a little faster. copper + oxygen ==> copper oxide. You will have a little problem here (I would have a little problem, too) because ...
Monday, October 6, 2008 at 9:35pm by DrBob222

science
why does a candle appear to go out when a copper coil is placed over the flame? Combustion requires three things: fuel (wax here), oxygen (air here), ignition temperature (a match here probably). Remove one and the combustion stops -- that's the principles firemen use to put ...
Wednesday, June 21, 2006 at 12:38am by jenna

science
We're all doing the same hw! lmao. Okay guys, I'm gunna help :) The chemical change is the wax, as it heats the flame vaporises and this vapour travels up the wick. The phsical change is the wick, when flame is applied to wick this wax is melted and vaporised... -A physical ...
Friday, October 20, 2006 at 2:34pm by Lucy

Chemistry
A 67gr mass of solid iron is heated by a flame until the temp of the iron equals the temp of the flame. The solid iron is then dropped into 250gr of liquid water at 26 degrees C. After 5 mins, the iron and the water are both at 47 degrees C. Specific heat: Iron- .451 Water- 4.184
Monday, March 30, 2009 at 11:04pm by Lacey

Chemistry
Using the results of the flame test would indicate that the precipitate is Ca2+. Although the color of the precipitate after the addition of K2CrO4 is the pale yellow of BaCrO4, that is only a superficial indication. CaCro4 is also yellow and may precipitate, particularly if ...
Friday, March 22, 2013 at 12:28am by Anonymous

Chemistry
Suppose we take the Na ion as an example. It has one electron in the outside shell. When anything containing the Na ion is placed in a flame, (NaCl, Na2SO4, NaBr, etc), the atom absorbs energy from the flame and the outside electron is moved to an outer energy level. That is ...
Saturday, January 12, 2008 at 9:10pm by DrBob222

Science
What type of spectrum are you talking about? Reflection from the solid? Intrared transmission? Visible or ultraviolet transmission of aqueous solution? Flame emission spectroscopy? Atomic absorption spectrometry? What do you mean by "reacted with fire?" In the flame emission ...
Wednesday, May 28, 2008 at 12:08am by drwls

Chemistry -Flame colors (check+help)
The colours that we see for an element in a flame is a mixture of the colours of the lines from emission spectra. Each line colour results from an electron 'falling' from a higher energy level to a lower energy level. Because the spacing of the energy levels is different for ...
Monday, February 14, 2011 at 3:26am by Dr Russ

science
This reference explains how a candle works better than I just did: http://www.answers.com/topic/diffusion-flame?cat=technology
Thursday, January 31, 2008 at 7:43am by drwls

Chemistry
Atoms usually exist in their "so-called" ground state; i.e., the lowest energy. When an atom is placed in a flame, the energy from the flame is enough to make an outer electron (say from a Na atom) move from the 3s level to a higher energy level. After a short period of time ...
Tuesday, September 17, 2013 at 8:52pm by DrBob222

chemistry
6 part question 1. describe the appearance of a Bunsen flame that is getting insufficient air? 2. describe the appearance of a Bunsen flame that is getting too much air. 3. When inserting glass tubing into a rubber stopper, how far from the stopper should you hold the tubing? ...
Wednesday, February 5, 2014 at 8:13am by Lisa

CHEMISTRY
1.List all the ions that cause a red flame and produce a precipitate in the presence of hydroxide ions. 2.List all the cations that could cause the red flame and produce a precipitate in the presence of sulfate ions. 3.
Monday, May 20, 2013 at 9:38pm by NEED help PLEEASE!!

science
phisical change ( u can see it ): A candle melts because of the heat of the flame. The wax turns to a liquid and drips down the candle base. On the way some of the wax turns back to a solid. But most of it gets lost in the air. chemical change (i think i got stuck on this part...
Saturday, October 21, 2006 at 10:00am by Kitty

Chemistry
I'm doing a flame testing lab in which I'm supposed to be able to identify an unknown element by observing the color it emits once heated. The color of the flame after heating this unknown metal is a light pinkish-violet. The question I need to answer asks what metal ion this ...
Monday, December 15, 2008 at 6:07pm by Brianna

Chemistry
The color of the K^+ flame.
Thursday, April 8, 2010 at 7:02pm by DrBob222

chemistry ------ flame test-------------
thanks for your help
Thursday, October 11, 2012 at 12:12am by Maria

Chemistry
Vinyl Chloride, H2C=CHCl would be the simplest compound in this group. Any one of the H's can be replaced by an alkyl group to form a more complicated vinyl organohalide. Vinyl molecules (monomers) can link together to form polyvinyl chloride plastics (PVC). A simple test for ...
Wednesday, June 24, 2009 at 1:13pm by GK

chemistry
what is the flame test for nickel
Monday, December 3, 2007 at 9:02am by Anonymous

Flame Colors - Chemistry
lame
Monday, November 6, 2006 at 8:11pm by Anonymous

science
What type of electromagnetic radiation does a flame emit?
Tuesday, December 4, 2007 at 8:18pm by Lorlexrik

science
what type of electromagnetic radiation does a flame emit?
Tuesday, October 13, 2009 at 7:14pm by Kristina

Chemistry
What are the characteristics of a perfect flame for a bunsen burner??
Tuesday, October 13, 2009 at 9:08pm by Paige

Flame Colors - Chemistry
green like a bogey
Monday, November 6, 2006 at 8:11pm by Anonymous

Chemistry
Benzene burns with intense smoky flame,this is b/c ?
Wednesday, January 25, 2012 at 10:59am by Chemo

Chemistry
the origin is the flame itself. I have no idea what x is.
Sunday, February 23, 2014 at 7:00pm by bobpursley

thermodyn. please check work
What is the sign of heat(Q), Work(W), or Temperature for these following situations. Say if it's +,-, or 0. 1)You hit a nail with a hammer: +W, Q=0, T=0 2)You hold a nail over a Bunsen burner: Q=+Q, Temp:constant, W=0 3)You compress the air in a bicycle pump by pushing down on...
Saturday, August 15, 2009 at 10:26pm by Anonymous

chemistry
Ni has no good flame test in the visible reagion.
Monday, December 3, 2007 at 9:02am by DrBob222

chemistry
is a flame coloration a test for the metal or for the acid radical?
Wednesday, January 13, 2010 at 6:54pm by Anonymous

Chemistry
why is flame test for chemicals important? give me reasons
Tuesday, October 26, 2010 at 12:59am by King Wah

physics
does the flame of gas stove emit light?explain
Thursday, January 5, 2012 at 3:39am by sachin

Chemistry
Propane forms a flame and emits heat as it burns.
Saturday, April 2, 2011 at 9:23pm by ronie

WorldHistory
by flame thrower do you mean Byzantine or "Greek" fire?
Friday, May 3, 2013 at 7:19pm by Damon

chemistry
why would my flame have looked bigger what do you think i was doing wrong?
Monday, May 10, 2010 at 9:24pm by grace

chemistry
Not really. In flame emissions, it's the metal that is excited, not Cl or F ions.
Wednesday, October 6, 2010 at 4:53pm by DrBob222

chemistry
I can't for the life of me figure out what a flame test has to do with a reported value.
Wednesday, October 6, 2010 at 6:05pm by DrBob222

chemistry
Ok maybe I didn't understand the question, I guess it doesn't, I just assumed it was a flame test
Wednesday, October 6, 2010 at 6:05pm by Alix

chemistry
give 2 commercial or practical uses of this flame color phenomena.
Tuesday, October 19, 2010 at 8:25pm by Kassandra

chemistry
what happens to the loosely held electrons when each ion is heated in the flame
Monday, November 15, 2010 at 9:28pm by natty

chemistry
what happens to the loosely held electrons when each ion is heated in the flame
Monday, November 15, 2010 at 9:29pm by natty

physics
The combustion products mixed with the air heated by passing through the flame area have a density lower than the ambient air in the room and rise. Therefore the gas is much hotter above the flame where these hot gases are heading. As You approach the ceiling, the hot gases ...
Wednesday, January 30, 2008 at 7:35pm by Damon

science
-Im probably not the samee 1 as yooh but im doing a h/w task on this *groans* -Physical'change: Thee Heat from the flame burns the wax, which melts into a liquid, running down the side of the candle. -Chemical'change: The wax is heated so much it turns to a liquid; which runs ...
Saturday, October 21, 2006 at 10:00am by -Dat'Gurl'Pippa

Flame Colors - Chemistry
pree sure its like an orange last time i checked :P
Monday, November 6, 2006 at 8:11pm by oh..ya know

Biology
If you are looking at a flame burning in a pit, what are the physical and chemical process/changes? Thanks
Tuesday, April 3, 2012 at 12:14pm by Sandy

chemistry
what will happen when potassium liliac colored flame is viewed through blue glass
Saturday, June 14, 2008 at 3:32am by Anonymous

chemistry
When hydrochloric acid is mixed with magnesium and a flame is put in the tube what causes a reaction?
Thursday, December 18, 2008 at 8:03pm by chris

chemistry
would ionic or covalent substances be more dangerous near an open flame? why?
Wednesday, March 4, 2009 at 7:54pm by pick

Chem.
We used a flame ionization detector (FID)to get a gas chromatogram of an unknown to identify.
Monday, November 2, 2009 at 10:37pm by Chelsea

chemistry
I wasn't there. I don't know. The only thing I can think of is wind (air currents) may have fanned the flame.
Monday, May 10, 2010 at 9:24pm by DrBob222

Chemistry
The air holes have to be closed. When the flame is luminous it is easier to see and not as hot.
Friday, September 24, 2010 at 11:01am by Angela

inorganic chermistry
what is the characteristic flame for sodium,lithium,barium,copper and calcium?explain why
Friday, October 1, 2010 at 3:04pm by kabelo

Physics
Lightning or any electrical discharge through a gas. A flame. A meteorite A supernova An LED
Sunday, October 17, 2010 at 8:44pm by drwls

Chemistry
the yellow bunsen flame produces alot of soot . give a reason for this obsevation
Thursday, July 10, 2008 at 1:58am by Richea

Chemistry
Why does only one of these ions (Co, Cu, or Ni) produce a positive flame test?
Thursday, November 17, 2011 at 1:19am by Taemin

Chemistry
Most aromatics burn with a smoky flame (due I suppose to unburned carbon).
Wednesday, January 25, 2012 at 10:59am by DrBob222

chem AP
for A. is it because the flame reacts with the sulfur in the coal to make acid rain instead of water?
Monday, January 28, 2008 at 9:43pm by ivy

chem AP
for A. is it because the flame reacts with the sulfur in the coal to make acid rain instead of water?
Monday, January 28, 2008 at 9:43pm by ivy

chemistry
which do you think would be more dangerous near an open flame, an ionic or covalent compound?
Monday, December 7, 2009 at 6:23pm by maria

chemistry
What flame color phenomena? What experiment? What materials? What did you do? We're in a vacuum here. Without your input we don't know what you're doing. (Sometimes we don't know what we're doing. :-)
Tuesday, October 19, 2010 at 8:25pm by DrBob222

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