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Analytical Chemistry
Page 9
Questions (747)
Assume your sample spots are 1 cm above the bottom of the TLC plate. What happens if you put the plate in a developing chamber
4 answers
asked by
JEN
1,584 views
You extract the iron from a tablet and dilute that to 350.0 ml in a volumetric flask. You transfer 0.500 ml of this solution to
4 answers
asked by
Kelcie
1,540 views
How can you tell which mobile phase is more polar in TLC? (hexane/ethyl acetate/ethanol vs. isopropanol/ammonia)? the
5 answers
asked by
L
1,525 views
Briefly outline a procedure you could use to determine the HC2H3O2 concentration in a vinegar sample.
What would the pH be at the
3 answers
asked by
Austin
1,535 views
A student was tasked to perform gravimetric analysis of a soluble sulfate. His unknown sample weighed 0.7543 g. The sample
5 answers
asked by
The anonymous
1,469 views
Back titration
1 answer
asked by
Kelvin
26 views
A 2.764 g sample containing only iron and aluminum metal was treated with acid to form Al(+3) and Fe(+2). The sample was then
3 answers
asked by
Jessica
1,423 views
A public water supply was found to have 0.8ppb by mass of chloroform, CHCl3. a) How many CHCl3 molecules would be present in a
5 answers
asked by
Stressed Chem Student
1,423 views
Calibration data for a bromide ion-selective electrode (ISE) was collected and recorded below. The potential of the ISE was
2 answers
asked by
Cassie
1,348 views
For the titration of 50.00mL of 0.1000 M ammonia with 0.1000 M HCl, calculate the pH
(a) before the addition of any HCl solution
4 answers
asked by
Anonymous
1,327 views
This is a limit test for chlorides.
1.0g of NaOH sample was dissolved in 5ml of deionized water, acidified with 4ml of
4 answers
asked by
candy
1,342 views
A 10.0 mL volvume of Ultra Bleach is diluted in a volumetric flask. A 25.0 ml sample of this solution is analyzed accordign to
2 answers
asked by
Ashley
1,284 views
The crucible is handled with oily fingers after its mass measurement but before the 3 gram sample of the hydrated salt is
2 answers
asked by
Diana
1,202 views
A student performed an anaysis of a samply for its calcium content and got the following results :
14.92% , 14.91%, 14.88% ,
4 answers
asked by
Mandy
1,195 views
Wich of the following is NOT true about the blank for the experiment, 'Analysis of a Complex Iron Salt'?
A. A blank is titrated
2 answers
asked by
eng
1,168 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
2 answers
asked by
Anonymous
1,144 views
An analytical chemist ways out, 0.314 g of an unknown diprotic acid into a 250 mL volumetric flask and I lose to the mark with
1 answer
asked by
Nadia
45 views
The amount of iron in a meteorite was determined by a redox titration using KMnO4 as the titrant. A 0.4408 g sample was
4 answers
asked by
lara
1,124 views
Consider the titration of 30.0 mL of 0.100 M NH3 with 0.150 M HCl. calculate the pH after the following volumes of titrant have
3 answers
asked by
Max
1,105 views
The percent water in methyl alcohol can be determined by gas chromatography using
a capillary column coated with a non-polar
2 answers
asked by
noha
1,087 views
For the titration of 50.00 mL of 0.1000 M ammonia
with 0.1000 M HCl, calculate the pH (a) before the addition of any HCl
1 answer
asked by
chamy
1,072 views
Many analytical instruments require liquid nitrogen. While filling an instrument with liquid nitrogen, an analytical chemist
2 answers
asked by
Katie
1,073 views
Cobalt was used as an internal standard to analyze a sample of titanium with atomic absorption spectroscopy. A mixture was
1 answer
asked by
ScienceGeek
1,077 views
Calculate the Concentration of Ni2+ in a soltion which prepared as mixing 50.0ml 0.0300 M Ni2+ and 50.0mlml 0.0500 M EDTA at pH=
1 answer
asked by
David
1,051 views
What will be the effect on a chromatogram of two well separated peaks if: (this is for a gas chromatography)
a) the carrier gas
1 answer
asked by
Ella
1,041 views
Analytical Chemistry question: Find the pH and the concentration of each species of lysine in a solution of 0.0010 M lysine*HCL.
2 answers
asked by
chemistrysally
1,048 views
A 2.304 gram sample containing an unknown amount of arsenic trichloride and the rest inerts was dissolved into a NaHCO3 and HCl
1 answer
asked by
Jessica
1,028 views
Alcohol levels in blood can be determined by a redox titration with potassium dichromate according to the balanced equation:
C2H5
5 answers
asked by
Mary
1,039 views
A student based the analysis of Cu(II) in a sample on the formation of the blue complex [Cu(H2O)6]+2. A standard solution was
2 answers
asked by
Anonymous
1,016 views
Quantitative analysis of soda ash by double indicator
*why there is a need to boil distilled water in the preparation of base
3 answers
asked by
tintin
1,023 views
Combustion analysis of 0.213 g of a compound containing C, H, and O produces 0.468 g of CO2 and 0.255 g of H2O. Mass spectral
2 answers
asked by
sam
1,055 views
Hii! I have a question: So the flame photometer uses a natural gas flame (1800 oC), what if it uses acetylene - nitrous oxide
2 answers
asked by
Anonymous
998 views
an acid base titration is conducted in which 20 ml of LiOH is added to 10ml of .200M HBr to reach the equivilance point. what is
2 answers
asked by
Elf
988 views
A 50.0 mL sample containing Cd2 and Mn2 was treated with 49.1 mL of 0.0700 M EDTA. Titration of the excess unreacted EDTA
4 answers
asked by
Chris
995 views
Iron can be determined gravimetrically by precipitating as Fe(OH)3 and igniting to Fe2O3. The sample to be analyzed is weighed
1 answer
asked by
Anonymous
976 views
The concentration of Pb+2 in a sample of wastewater is to be determined by using gravimetric analysis. To a 100.0-mL sample of
2 answers
asked by
Cynthia
991 views
why the acidic medium is used for determination of the amount if iorn in a sample of soil using standard KMnO4
2 answers
asked by
DILANI
923 views
metals with 8-hydroxyquinoline, C9H7NO. After weighing the mixed precipitate, the precipitate is dissolved and the amount of
1 answer
asked by
Anonymous
945 views
An air bubble is present in the stopcock at the start of the titration but is passed out during the titration. Would this error
3 answers
asked by
Joantense
944 views
a silver coin has a mass of 2.50g and is analysed for silver by dissolving in dilute nitric acid, and precipitating silver as
2 answers
asked by
HELP PLEASE!!!!
923 views
Describe the procedure you would follow to determine the concentration of Vitamin C in a sample if the volume of DCPIP required
3 answers
asked by
Audrey
916 views
The normality of NaOH obtained was 0.0172, 0.0187, 0.0185, 0.189, and 0.0183 N. The theoretical normality of NaOH was 0.02 N.
3 answers
asked by
Caroline
944 views
You are a chemist requested to review and analyse certain debris found on thebottom of aboot found in a crime scene. The debris
2 answers
asked by
Jimmy
905 views
Help me with this;
For the second part of the analysis,you will be provided with hydrated crystal of oxalic acid (H2C204. 2H2O).
3 answers
asked by
Henry
928 views
If the 50.00mL sample from problem 3 above was titrated with EDTA,what volume of a 0.00420 M EDTA solution would be needed to
2 answers
asked by
Alex
883 views
3. What experimental problems would confront you if you attempted to determine the concentration of the metal ions in solutions
1 answer
asked by
Joe
899 views
Hello, we recently did a lab in our chemistry class to analyze an Unknown amount Calcium Carbonate which was titrated with EDTA.
3 answers
asked by
Anna
908 views
An analytical chemist weighs out 0.132 g of an unknown triprotic acid into a 250 mL volumetric flask and dilutes to the mark
1 answer
asked by
Nadia
47 views
A 10.0-mL sample of vinegar, which is an aqueous solution of acetic acid, CH3COOH, requires 16.5 XML of a 0.500M NaOH solution
2 answers
asked by
Zarion Gibbs
880 views
A Serum taken from a patient being treated with lithium for manic-depressive illness was analyzed for lithium concentration. A
2 answers
asked by
Chris
852 views
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