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Analytical Chemistry
Page 4
Questions (747)
what are the errors in the double-indicator titration of (sodium carbonate and sodium hydrogen carbonate) against hydrochloric
3 answers
asked by
kay
864 views
An analytical chemist determines that an estuarine water sample contains 1.5 g/L of sulfate ion. What is the concentration in
3 answers
asked by
Laura
920 views
double indicator titration of phosphoric acid with sodium hydroxide
4 answers
asked by
Anonymous
850 views
25.00 mL aliquots of the solution from Part 1 are titrated with EDTA to the Eriochrome Black T end point. A blank containing a
3 answers
asked by
saddee
3,302 views
For the titration of 20.0 mL of 0.1500 mol/L NH3(aq) with 0.1500 mol/L HI(aq)(the titrant), calculate
a) the pH before any HI(aq)
3 answers
asked by
Ross
1,188 views
Using the data below calculate the unknown concentration of 0.2 ml Unknown Protein in mg/ml given A is 0.22.
Protein (ug) A 15
3 answers
asked by
Sam
136 views
You are given a solution that is supposed to contain calcium phosphate. What test can you perform to confirm the presence of
1 answer
asked by
Aiko
344 views
How to determine calcium trioxocarbonate (IV) content in a chalk by back titration
4 answers
asked by
Anonymous
2,024 views
What is the concentration of an unknown potassium dichromate solution with an absorbance of 1.603 at 345nm? (The path length is
3 answers
asked by
Ainsley
518 views
A 99.99% pure, 0.4903 g sample containing only carbon, hydrogen, and nitrogen is subjected to combustion analysis, resulting in
3 answers
asked by
Ally
523 views
Calculate the ph of a 1L solution to wgich has been added 25ml of 10mM acetic acid and 25ml of 30mM sodium acetate
3 answers
asked by
Grace
1,797 views
Why HNO3 only can used for acidification in volhard method not other acids like HCl or H2SO4?
3 answers
asked by
Amal
1,147 views
An enzymatic method for determining alcohol in wine is evaluated by comparison with a gas-chromatography (GC) method. the same
2 answers
asked by
pacey
736 views
In a titration of 0.5 M HCl and an unknown concentration NaOH, 25.0 ml of NaOH was required to completely neutralize 25.0 ml of
3 answers
asked by
elly
641 views
a 30 mL sample of vinegar is titrated with .1098 M NaOH. it takes 43.28 mL naOH solution to reach the endpoint. Determine the
3 answers
asked by
Jeff S.
702 views
A student titrates a 25.00 mL sample of HCl. If 20.50 mL of 0.175 M of KOH is required to reach the end point, what is the
3 answers
asked by
Linda
918 views
Zinc is to be used as an internal standard for the polarographic analysis of thallium. A standard solution containing twice the
3 answers
asked by
Adeola
534 views
The amount of organic carbon in a sample can be obtained by IR analysis of the carbon dioxide (CO2) released following complete
4 answers
asked by
adam
950 views
an organic pesticide (mw 183.7) is 8.43% cl. a 0.627g sample containing the pesticide plus inert material containing no chloride
4 answers
asked by
vivian
1,634 views
in the gravimetric determination of barium in BaCrO4, what weight of sample must be taken so that the weight of the precipitate
3 answers
asked by
vivian
1,663 views
Gas Chromatography:
The internal standard technique is used. A volatile component which does not interfere with the GC analysis
3 answers
asked by
Courtney
413 views
why can't gravimetric analysis be used to determine the concentration of sodium nitrate (NaNO) in a solution?
I think the answer
3 answers
asked by
Morgan
1,997 views
I titrated a 250mg tablet to see if it really had 250mg of scorbutic acid (H2C6O6) a diuretic acid, in it. I took a 250mg
7 answers
asked by
mark
572 views
In a group 1 analysis, a student adds hydrochloric acid to the unknown solution to make [Cl-] = 0.15 M. Some PbCl2 precipitates.
3 answers
asked by
fatima
1,620 views
I am trying to complete a lab called Precipitation Titration of Cobalt Chloride. I've done the experiment and I got that if you
3 answers
asked by
Jay
1,455 views
The concentration of Pb2+ in a sample of wastewater is to be determined by using
gravimetric analysis. To a 100.0-mL sample of
3 answers
asked by
Anonymous
841 views
Emission Analysis of Aqueous Solutions of Groups IA and IIA Metal Salts
A student records two potassium emission spectra: 1) one
3 answers
asked by
Ali
570 views
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was
2 answers
asked by
ScienceGeek
816 views
The following data were obtained when a Ca2+ ion selective electrode was immersed in a series of standard solutions.
Ca2+ (M)
5 answers
asked by
PreMed33
684 views
Why is a Gas Chromatography separation more efficient than a fractional distillation?
What characteristics must the liquid
2 answers
asked by
Garet
1,328 views
determination of the oxalate content in k2 cu(c2o4)2 .2h2o,
during standardization of permanganate solution using sodium oxalate,
3 answers
asked by
ABCx
1,001 views
How would you analyze a solution known to contain Hg22+ and Cu2+?
4 answers
asked by
Kelly
422 views
assuming the vinegar solution has a density of 1.01 g/mL, calculate the percent by weight of actic acid (CH3CO2H) in your sample
3 answers
asked by
Wandy
1,135 views
The concentration of calcium ions in hard water can be determined by titration with reagent X,which forms a complex with
3 answers
asked by
Anonymous
680 views
Fish-liver oil is a good source of Vitamin A. When 0.1232 g of fish liver oil is dissolved in 500. mL of solvent, an absorbance
3 answers
asked by
dave
501 views
would bromocresol green be a good indicator for the titration of CH3COOH against NaOH?
5 answers
asked by
Anonymous
1,121 views
A student titrated 10.00mL aliquots of her unknown amino acid solution with standard 0.1521M NaOH and with 0.0986M HCl.
3 answers
asked by
Brandon
1,057 views
In gas chromatography, what would be the order of the retention times for your mixture (hexane and toluene)? What is the basis
3 answers
asked by
Soojung
904 views
We had an experiment in class: Soda Ash Titration using Double Indicator Method
How would you know the composition of the sample
3 answers
asked by
patricia
566 views
In paper chromatography, why must the starting line be drawn with pencil?
Thanks!
2 answers
asked by
Karen
876 views
What is the order that these four compounds would travel through a silica gel column during liquid chromatography?
a) ethylene
3 answers
asked by
mia
581 views
Again, from my previous question about gravimetric analysis...
Why can't NH4Cl be used as a substitute for NH3 in precipitating
3 answers
asked by
Smiley
1,573 views
Experiment: Gravimetric Determination of Phosphorus in Fertilizer Samples
1. Can NH4Cl be used as a substitute to precipitate the
4 answers
asked by
Smiley
1,534 views
Would Flame test be useful for detecting metal ions present in a mixture of metal ions??
It is not a reliable method. Atomic
3 answers
asked by
Bryan
2,718 views
Why is methyl orange used as an indicator in the titration of HCl and borax
2 answers
asked anonymously
39 views
1-A sample of potassium hydrogen oxalate, KHC2O4, weighing 0.717 g, was dissolved in water and titrated with 18.47 mL of an NaOH
4 answers
asked by
Hiba
776 views
An 800-mg sample containing sulfate was treated with slight excess of barium chloride, yielding a precipitate that contained 4.3
3 answers
asked by
Jay-jay
688 views
create a lab report on Qualitative Analysis of Cations.
1 answer
asked by
rondel
68 views
Barium can be analyzed by precipitating it as BaSO4 and determining the mass of the precipitate. When a 0.354g sample of a
1 answer
asked by
Laura
107 views
A sample of chlorides weighing 0.2082 g is dissolved in water, transferred to a 100 mL volumetric flask and 50 mL of 0.1 M
1 answer
asked by
Ji-an
239 views
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