Questions LLC
Login
or
Sign Up
Ask a New Question
Analytical Chemistry
Page 6
Questions (773)
salam....
plz give me some sources of error of determining concentration quotient of FeSCN? plzz urgent
3 answers
asked by
hamza
560 views
y question is about Determination of Iodine Value in Fats & Oils experiment. I can't seem to get the right IV for coconut oil
1 answer
asked by
Summer
416 views
Cu+ reacts with neocuproine to form the coloured complex (neocuproine)2Cu+, with an absorption maximum at 454 nm. Neocuproine is
3 answers
asked by
panchi
1,368 views
Determine the concentration of iron in an aqueous solution containing 0.2810 grams of Fe(NH4)2(SO4)2 per liter of solution.
4 answers
asked by
jenine
621 views
you have 12.56 g of a mixture made up of sodium chloride and barium chloride. explain how you could use a precipitation reaction
4 answers
asked by
Nathan
427 views
Titration of 50.0 mL of acetic acid reaches equivalence after delivery of 22.5mL of standardized NaOH 0.21 M.
What is the initial
3 answers
asked by
philip
519 views
A student wanted to determine the amount of copper in a sample of copper ore. The student
dissolved a 2.500 ± 0.001 g piece of
2 answers
asked by
Anonymous
524 views
Suppose a 4.272 g soil sample undergoes an extraction with 50 ml of extracting solvent to remove the lead. This 50 ml was then
4 answers
asked by
Lori
608 views
DDT concentrations in ground water. How do you set it up with a sample size of 250.0mL and the mass of DDT at 0.030 and then
1 answer
asked by
john
446 views
What are the advantages of using graphical endpoint(potentiometric endpoint) compared to usual endpoint(chemical indicator)
1 answer
asked by
cj0021
430 views
Regarding ICP analysis
4. For each of the following electrical discharge sources list the major strengths and limitations: a. dc
1 answer
asked by
lori
462 views
We were given an unknown to identify using UV-VIS spec based on the wavelength of maximum absorbance and the shape of the curve
3 answers
asked by
Anonymous
478 views
If the calibration curve for a Beer's Law plot of a protein assay had a slope of 0.433 when absorb acne, A, was plotted as a
4 answers
asked by
S
494 views
I'm using chromatography to identify compounds in a leaf extract for a lab, and one of the evaluation questions is 'Suggest a
3 answers
asked by
Erika
467 views
The nitrogen content of a .2476 g sample of a protein was determined by the Kjeldahl method. The NH3 produced with the whoosh
2 answers
asked by
Anonymous
624 views
What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption
1 answer
asked by
Instrumental
447 views
What affects peak shape in gc? I know peak area is proportional to the amount of a species and tailing occurs due to adsorption
1 answer
asked by
Instrumental
367 views
A water sample was analysed using a sodium selective electrode. The electrode response was 75.0 mV. A 10.00 mL aliquot of
1 answer
asked by
RC
510 views
Calculate pCd2 at each of the following points in the titration of 55.00 mL of 0.0020 M Cd2 with 0.0020 M EDTA in the presence
2 answers
asked by
achut
470 views
the titration of 25cm^3 of a zinc solutn required 23 82cm^3 of 0.0105molar EDTA solutn. Calculate the conc of zinc in g/dm^3.
1 answer
asked by
Ade oba naim
346 views
The following data was obtained from titrating a solution containing 25 mL of 0.0100 M MgCl2 solution, 1 mL of NH3OH buffer, and
1 answer
asked by
andy
483 views
Consider a sample that is a mixture composed of biphenyl, benzoic acid, and benzyl alcohol. Predict the order of elution of the
1 answer
asked by
bez
819 views
Anyone here good with clinical chemistry, particularly separation assays and high performance liquid chromatography?
1 answer
asked by
James
335 views
A 50.0 mL sample containing Cd2 and Mn2 was treated with 58.7 mL of 0.0500 M EDTA. Titration of the excess unreacted EDTA
2 answers
asked by
Lana
516 views
Calculate pCd2 at each of the following points in the titration of 40.00 mL of 0.0040 M Cd2 with 0.0040 M EDTA in the presence
1 answer
asked by
Ashley
907 views
A 24.393 g sample of aqueous waste leaving a fertilizer manufacturer contains ammonia. The sample is diluted with 80.601 g of
2 answers
asked by
Ashley
516 views
Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A
2 answers
asked by
Brian
543 views
Low concentration replicate samples of Pb-EDTA gave the following counts in a mass spectral measurement: 188.3, 145.9, 159.7,
2 answers
asked by
holly
589 views
Discuss qualitative and quantitative test you would perform to detect or quantify monosaccharides in solutio. Discuss the
1 answer
asked by
jam
348 views
what are the Uses of Infrared Spectroscopy?
3 answers
asked anonymously
41 views
A very short paragraph of what are the Uses of Infrared Spectroscopy?
3 answers
asked anonymously
42 views
if I was asked to set up a procedure that will allow me to check the concentration of aqueous Co2+ ions in a reaction vessel
1 answer
asked by
Anna
397 views
Identify the error in the following scenario and indicate how you would fix the error: A TLC of a two component mixture of
1 answer
asked by
Sarah
459 views
Thin Layer chromatography
TLC experiment What does it mean when it says with to much sample the spots will tail
1 answer
asked by
Nathalie
403 views
What effect would tap water have on the volume of EDTA required for titration?
1 answer
asked by
Kasia
419 views
Before determining the amount of sodium carbonate in a sample by titration with standard hydrochloric avid the anaylst decide to
1 answer
asked by
Brittany
990 views
a student determined the Ca^2+ ion content of a 100mL sample of calcium-fortified orange juice. After adding 2.0M HCl solution
1 answer
asked by
anne
1,107 views
Consider the titrations of 24mL of 0.050M HClO4 with 0.100 M KOH. Find the pH at the following volumes of KOH; Vb: 0.1, 5, 10,
1 answer
asked by
Jocelyn
375 views
An unknown was prepared with the concentration of 0.000520 M. A Beer's Law plot was prepared using the absorbance values from
1 answer
asked by
anchal
457 views
formt he diluted unknown concentration which i found to be 1.50mg/L i have to calculate the [Fe] in the PRIMARY unknown
1 answer
asked by
Anonymous
902 views
how to calculate the % oil of thyme in thyme ?
We did an experiment titled : the extraction of Thymol in thyme oil and the prof
1 answer
asked by
Heidi
356 views
suggest a technique , other than tlc, to confirm the purity of the samples
1 answer
asked by
pavan
416 views
a compound is analysed and found to have the atomic composition of C 54.5454% H 9.0909 % o 36.3636%. at a temp. of 120C and a
1 answer
asked by
Amanda
329 views
gas chromatographic analysis of a mixture of organic compounds gave the following peak areas: 2-hexene= 2.5 2-bromogexane=4.0
1 answer
asked by
jessica
798 views
Suppose that a 15-mL sample of a solution is to be tested for I- ion by addition of 1 drop (0.20 mL) of 0.30 M Pb(NO3)2. What is
3 answers
asked by
HELP PLEASE to DrBob222
1,657 views
In a thin layer chromatography (TLC)experiment,the TLC plate was pre-developed in the development chamber containing the mobile
2 answers
asked by
Anne
517 views
I have a question on thin layer chromatography (TLC).
My mobile phase (i.e. developing solvent) is a mixture of 2 non-polar
2 answers
asked by
Anne
512 views
In the gravimetric determination of barium as BaCrO4, what weight of sample must be taken so that the weight of the precipitate
3 answers
asked by
Ariel
551 views
An antacid tablet weighing 3.084 g was dissolved and diluted to 100.0 mL in a volumetric flask. A 25.00-mL aliquot was removed
2 answers
asked by
Rika
967 views
The concentration of dissolved chlorine in tap water can be determined by adding excess potassium iodide and then using aqueous
4 answers
asked by
Maame
871 views
Pages
1
2
3
4
5
6
7
8
9
10
Parent Categories (14)
Chemical Reactions
Chemistry
Chemistry Education
Inorganic Chemistry
Organic Chemistry
Physical Chemistry
Science
Science (or Chemistry)
Science and Chemistry
Science and Research
Science and Technology
Science Education
Science/Chemistry
Scientific Methodology