Tuesday
November 25, 2014

Search: chemistry ------ flame test-------------

Number of results: 52,661

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 ...
July 10, 2008 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 ...
July 10, 2008 by Chu

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 ...
November 6, 2006 by J.M.

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 ...
October 21, 2007 by amaliyah

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 candleís flame . Because flame of candle emit red ,and red has the least energy in visible light.
October 11, 2012 by Maria

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!
August 16, 2010 by Anonymous

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 ...
September 17, 2013 by Sarah

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 ...
February 14, 2011 by Farah

chemistry
what is the flame test for nickel
December 3, 2007 by Anonymous

chemistry
is a flame coloration a test for the metal or for the acid radical?
January 13, 2010 by Anonymous

Chemistry
why is flame test for chemicals important? give me reasons
October 26, 2010 by King Wah

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

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 ...
May 10, 2010 by grace

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

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?
October 21, 2011 by EBS123

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 ...
May 27, 2008 by Maddie

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
January 19, 2011 by John

chemistry .chemistry
obtanin a piece of comcentrated acetic acid and 10 ml of di- water . bring the content of this beaker to a gentle boil using a low flame on the Bunsen burner . boild for about 3minutes , alow to cool and then remove the steel wool ball . what is formula? Ans : Fe + 2CH3COOH...
October 17, 2012 by John

chemistry
when doing a flame test: the hydrated salt is overheated and the anhydrous salt thermally decompose, one product being a gas; will the reported value of x be too high, too low on the unaffected?
October 6, 2010 by Alix

Chemistry
Would flame test be useful for detecting metal ions present in a mixture of metal ions?
October 1, 2008 by Martimer

Chemistry
What color would Nickel ions burn (say in a compound of NiSO4)? Green? If you searched this on the web please post the link for a reference I can use. I don't have a reference. In fact, it is not listed in any text book I own and it is not listed on any of the sites I found on...
November 6, 2006 by J.M.

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...
October 21, 2011 by KatieSc

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 ...
June 21, 2006 by jenna

Chemistry
I need help with this chemistry flame test lab discussion question. "List the metals used in this lab in increasing order of the energy of the light emitted." We tested BaCl2, CaCl2, CuCl2, FE(NO3)3, KCl, LiCl, NaCl, & Sr(No3)2. I'm not completely sure how to know the energy ...
November 2, 2013 by Elva

Chemistry
I need help with this chemistry flame test lab discussion question. "List the metals used in this lab in increasing order of the energy of the light emitted." We tested BaCl2, CaCl2, CuCl2, FE(NO3)3, KCl, LiCl, NaCl, & Sr(No3)2. I'm not completely sure how to know the energy ...
November 2, 2013 by Elva

Chemistry
I need help with this chemistry flame test lab discussion question. "List the metals used in this lab in increasing order of the energy of the light emitted." We tested BaCl2, CaCl2, CuCl2, FE(NO3)3, KCl, LiCl, NaCl, & Sr(No3)2. I'm not completely sure how to know the energy ...
November 3, 2013 by Elva

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?
October 1, 2010 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?
November 4, 2011 by Deborah

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...
September 20, 2009 by Emily

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 ...
March 3, 2008 by amy21

chemistry ------ flame test-------------
Did the nitrate ion effect the color emission of the solution ? how did you decide ? my answer: No , because The nitrate ion is the oxidizing agent in the compound without it you could not burn the chemicals and you could not produce a spectrum so there would be no emission ...
October 11, 2012 by Maria

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?
October 19, 2011 by KatieSc

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.
October 6, 2008 by Lena

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
March 30, 2009 by Lacey

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.
January 30, 2008 by HELP!

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?
April 1, 2010 by Sara

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 ...
November 4, 2012 by doris

Science
I need help with this chemistry flame test lab discussion question. "List the metals used in this lab in increasing order of the energy of the light emitted." We tested BaCl2, CaCl2, CuCl2, FE(NO3)3, KCl, LiCl, NaCl, & Sr(No3)2. I'm not completely sure how to know the energy ...
November 3, 2013 by Elva

Chemistry
What are the characteristics of a perfect flame for a bunsen burner??
October 13, 2009 by Paige

Chemistry
Benzene burns with intense smoky flame,this is b/c ?
January 25, 2012 by Chemo

biochemistry
for each of these qualitative test,barfoed test,benedict test,seliwanoff test,bial test,molisch test,and iodine test, describe the class and give aspecific example of a carbohydrate that would yield a posiyive result?
April 8, 2011 by kabelo

chemistry
give 2 commercial or practical uses of this flame color phenomena.
October 19, 2010 by Kassandra

chemistry
what happens to the loosely held electrons when each ion is heated in the flame
November 15, 2010 by natty

chemistry
what happens to the loosely held electrons when each ion is heated in the flame
November 15, 2010 by natty

Chemistry
Suggest why calcium compound produce a coloured flame but magnesium do not?
September 2, 2014 by Syam

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? ...
February 5, 2014 by Lisa

AP Chemistry
I need help with figuring out an appropriate way to do this sort of lab: how to determine an unknown compound. With this one however, the teacher just gave us a white powdered compound - and asks us to figure out how to identify it using ANY lab procedures. He gave hints that ...
May 18, 2009 by T

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.
May 20, 2013 by NEED help PLEEASE!!

college
A solid is known to be either BaCO3 or CaCO3. It is dissolved in 6 M acetic acid. A pale yellow precipitate forms when K2CrO4 solution is added. The subsequent flame test with that precipitate shows an orange-red color. Which cation is present? Briefly explain
March 22, 2013 by Anonymous

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 ...
December 15, 2008 by Brianna

chemistry
what will happen when potassium liliac colored flame is viewed through blue glass
June 14, 2008 by Anonymous

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

chemistry
would ionic or covalent substances be more dangerous near an open flame? why?
March 4, 2009 by pick

Chemistry
What is the function of Compressed Air in GC-FID (i.e. Gas Chromatography-Flame Ionization Detector)?
March 18, 2012 by anne

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...
February 16, 2010 by Sara

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

Chemistry
it is considered a saftey hazard to leave an operating burner unatteneded unless the flame is made luminous10 explain why
September 24, 2010 by christine

Majoooooor Help please please help me
Please can you give me what are the products , the colour of the flame, how does it react when : 1- Zinc reacting with oxygen Zinc reacting with air 2- Iron filings with oxygen Iron filings with air 3- Copper reacting with oxygen Copper reacting with air 4- Magnesuim reacting ...
February 16, 2007 by Amy

Chemisrty
Would Flame test be useful for detecting metal ions present in a mixture of metal ions?? It is not a reliable method. Atomic spectroscopy would be much more accurate and sensitive than the human eye. To add to the information provided by Bob Pursely, which of course is correct...
October 23, 2006 by Bryan

Chemistry-please help
1) Metals that are above hydrogen in the reactivity series react with dilute hydrochloric acid to produce hydrogen gas. Lead is just above hydrogen in the reactivity series.I read a book that says no reaction occurs between lead & dilute acid. Why? Is it because the reaction ...
January 26, 2009 by candy

Chemistry
Hi, I have to take chemistry placement test for college this week. Does anyone here have advice for studying to prepare for the test? I took chemistry in high school 2 years ago so I don't remember anything.
October 11, 2010 by Advice please

Chemistry
1. Take a clean test tube from the Glassware shelf and place it on the workbench. Add 1 mL your mystery solution to the test tube. 2. PRECIPITATION BY NaC2H3O2(aq) (a) Add 2 mL of sodium acetate solution to the test tube. (b) If a white precipitate forms at the bottom of the ...
August 11, 2010 by annonomus

Chemistry
PRECIPITATION BY NaC2H3O2(aq) (a) Add 2 mL of sodium acetate solution to the test tube. (b) If a white precipitate forms at the bottom of the test tube, decant the remaining liquid into another clean test tube and retain the precipitate. (Decanting is the same as pouring, but ...
August 12, 2010 by stacy

Clinical Chemistry
Why is slightly higher serum sodium consistently found by evaluation by ion-selective electrode (ISE) as compared to flame photometry?
April 9, 2013 by Kelley

Chemistry
when heating a beaker, where should the burner flame be located for maximum heating?
June 16, 2008 by Anonymous

CHEMISTRY
do the positive ions or the negative ions cause the change in flame color?
October 27, 2013 by Anonymous

chemistry
why a flame of fire faces to the upward direction and not to the downward direction even having the effect of gravity?
January 18, 2013 by berton

CHEM
Will you please tell me if these are right? Write the symbol of the caton or anion that give(s) the following reaction:? 1. Forms a precipite with AgNO3 that does not dissolve in HNO3 2. Forms a gas with HCl 3. Give a bright, yellow-orange flame test 4. Forms a precipitate ...
November 7, 2010 by Jason

tax income
To be a qualifying child, the taxpayer must meet three general tests and five specific tests. What are the three general tests? A. Relationship test, residency test and gross income test B. Support test, age test and relationship test C. Dependent taxpayer test, relationship ...
March 2, 2012 by Billy

chemistry
In a bunsen burner experiment, when you place a piece of soot covered chalk over the hottest part of the flame, it changes back to a white color. What is the equation for this process? Thank you
October 10, 2012 by Samantha

Statistics
Which one of the following test is used to compare five means, simultaneously? Run test Normally test One way ANOVA 2 Sample T Test F-Test
September 15, 2010 by Beata Chmielewska

tax income
To be a qualifying child, the taxpayer must meet three general tests and five specific tests. What are the three general tests? A. Relationship test, residency test and gross income test B. Support test, age test and relationship test C. Dependent taxpayer test, relationship ...
March 2, 2012 by Billy

Chemistry
A Test Liquid Has A Density Of 1.1g/ml. When You Pour Some Of It Into A Cup Of Water, What Will Happen (assuming that their natures are such that they don't mix & that there is no chemical reaction between the two substances)? Choose a.b.c. or d. A The test liquid will float ...
July 8, 2008 by Mickeyv

Math
If Sally makes all scores of 100 on ten of her homework assignments and 80 on her first test and 85 on her second test and 86 on her third test and 95 on her project. What would Sally's grade be if homework is 10%, test 1=20% test 2=20%, test 3=25%, and project=25% ?
April 23, 2008 by Jadia

Chemistry
What colors would you expect to see in a flame for the following compounds: potassium chloride, potassium nitrate, and potassium sulfate. Explain your answer
April 8, 2010 by Sarah

Chemistry
I did a melting point test for menthol and the question is asking what type of compound is demonstrated and the answer should include inter molecular forces I also need to explain this same question for a solubility in water test and solubility in oil test
October 27, 2012 by Anonymous

Statistics
When population data are discrete and you want to compare two populations, which test is most appropriate? a. T-test b. Anderson Darling c. Levenís d. 2-Proprotion test e. F-test
September 15, 2010 by Beata Chmielewska

Science 7R
Tomorrow I have a science test on circulatory system and is there a practice test THAT IS ON 7TH GRADE SCIENCE REGENTS LEVEL!?!? please i really want to do well on the test if take a pre-test thanks ;) btw --- i'm going over my notes for the test just that i want to take a pre...
May 15, 2012 by Laruen

Chemistry
I need to determine the "percentage composition unknown" whatever that is. My current data: a) mass of test tube and foil cover: 7.5323 g b)temp of water bath: 375.65 K c) mass of test tube and foil and gas as sample: 7.5423 g d) barometric pressure: 1.0190 kpa e) mass of test...
November 4, 2010 by Selina

Statistics
Which test determines if there is a difference between the mean of a group and proposed standard value? Paired t-test F-test One Sample t-test One way ANOVA Two sample t-test
September 15, 2010 by Beata Chmielewska

Biology/Chemistry
Is there any other way to test for starch besides the potassium iodide test?
January 8, 2008 by Eddie

chemistry
how can i describe the test to see if ACIDS ar covalent or ionic what do the results of such a test show
October 31, 2008 by lila

chemistry
what chemical test can be used to test for lead in water
August 11, 2010 by Kelsey

Psych
If an iq test has high predictive validity, then a. a psychologist can accurately guess what score someone will get before he or she has started the test. b. students who get good score on the test will get even better scores if they take the test again c. The mean and ...
March 21, 2012 by Ashley

Chemistry
In the qualitative test for nitrate anion, the test goes like this: - Add dilute sodium hydroxide, then add a little aluminium powder. Warm. When describing the test, is it acceptable to use the word "mixture" as in "warm the mixture"? thanks.
January 22, 2009 by janice

Chemistry
We did a flame testing lab today with the following metal ions: Sodium, Na^+1 Barium, Ba ^2+ Calcium, Ca ^2+ Copper, Cu ^2+ Potassium, K ^+1 Strontium, Sr ^2+ Lithium, Li ^+1 The question asks to explain the effect of the nitrate ion solution on the color emission. Please help...
December 16, 2008 by Ellen

Chemistry
What is another way to test for hydrogen and oxygen; other than the burning splint test? My teacher gave us the hint of- Universal Indicator
March 11, 2012 by Julie

Chemistry
What happens in confirmatory test for bismuth? What happens in confirmatory test for copper? What happens in confirmatory test for arsenic? Please help! an you explain in detail. even a link explaining it would help
October 31, 2011 by travis

Math
There are four tests in a year. The first test is worth 26%, the second is worth 20%, the third test is worth 30%, and the fourth test is 20%. Maria received a 59% on her first test. To recieve a final mark of 65%, what is the minimum she needs to obtain on each test? Can ...
November 18, 2010 by Diana

Math - Averages
The test average for Louis' calculus class is found by taking the arithmetic mean of his four best test scores. If his first four test scores are 65,82,76 and 87, what score must he get on the fifth test to raise his test average to an 85?
September 13, 2013 by Venus

statistics z or t test
the average weekly earnings of a production worker were $424. to know if wages, on average, have gone up since that time. To test this, you sample 64 production workers, and determine that their average salary is $432.69, with a sample standard deviation of $33.90. Use a 0.05 ...
July 19, 2010 by Anonymous

chemistry
Would flame tests be useful for detecting metal ions present in a mixture of metal ions? Explain. In some cases, yes. In most cases, no.
May 11, 2007 by Anonymous

chemistry
ok im confused would ionic or covalent substances be more "dangerous" near an open flame? and why would they be more dangerous?
March 4, 2009 by pick

Chemistry
You have 20mL of a solution of concentration 0.015mg/mL of x in test tube #1. Prepare serial dilutions of your stock solution, and calculated the concentration of x as follows: Add 10mL of distilled water and 10mL of stock solution from test tube 1 to test tube 2. Add 10mL of ...
November 3, 2010 by Jon

chemistry
True or False? Two identical beakers of water that have been over the same size flame for the same length of time will ALWAYS stay at the same temperature, no matter how much water is inside.
April 14, 2011 by Jessica

Statistics
The ____________ is a hypothesis-testing procedure in which there are two separate groups at people tested and the population variance is not known. - t test for dependent means - t test for a single sample - t test for independent means - t test for repeated measures
October 11, 2009 by Trey

math
the probabilities that 3 friends A,B andC pass a driving test are1/3,1/4,2/5 respectively.All 3 take the test find the probability that(a)aa 3 failed the test (b) only B passes the test(c) only 2 of them pass the test (d)at least 1 passes the test... I will do one. Assuming ...
June 26, 2007 by celina

chemistry
obtanin a piece of comcentrated acetic acid and 10 ml of di- water . bring the content of this beaker to a gentle boil using a low flame on the Bunsen burner . boild for about 3minutes , alow to cool and then remove the steel wool ball . what's happened in procedure? i mean ...
October 16, 2012 by John

Statistics/Math
I want to test H0: p = .12 vs. Ha: p ≠ .12 using a test of hypothesis. This test would be called a(n) ____________ test. A) two-tailed B) right-tailed (this one?) C) left-tailed
October 29, 2013 by Michael

Statistics!!!
b. The correlation between the number correct on a math test and the time it takes to complete the test is -.45. Test whether this correlation is significant for 80 children at the .05 level of significance. Choose either a one-or two-tailed test and justify your choice.
July 8, 2013 by Ethel

Pages: 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | Next>>

Search
Members