1. Calculate the weight % of each component in an unknown sample of volatiles using Area Normalization. Given the following information use ethanol as the internal standard. Standard Component Unknown sample Weight used Raw Peak Area Component Raw Peak Area (mg) Ethanol 498.3 5104 Ethanol 3495 Hexane 756.4 9285 Hexane 3267 Benzene 412.7 4374 Benzene 2894 Ethyl acetate 628.9 7239 Ethyl acetate 5402 2. Calculate the absolute error between the normalized area percentages and the calculated weight percentages of the unknown components.

1. Calculate the weight % of each component in an unknown sample of volatiles using Area Normalization. Given the following information use ethanol as the internal standard. Standard Component Unknown sample Weight used Raw Peak Area Component Raw Peak Area (mg) Ethanol 498.3 5104 Ethanol 3495 Hexane 756.4 9285 Hexane 3267 Benzene 412.7 4374 Benzene 2894 Ethyl acetate 628.9 7239 Ethyl acetate 5402 2. Calculate the absolute error between the normalized area percentages and the calculated weight percentages of the unknown components.

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter7: Statistical Data Treatment And Evaluation

Section: Chapter Questions

Problem 7.18QAP

See similar textbooks

Similar questions

Give example and explanation of each words: Standard Solution Supernatant liquid Abscissa Atomic mass Concentration Density Equilibrium Constant Formula mass
Calculate the average and standard deviations for each solution (and solvent).
2. A gas chromatogram of a four-(4)-component mixture had the following areas and retention times (RT). Component ABCD (RT) (min) 2.564 5.241 1.904 3.217 Area (mm²) 2341 1278 4302 1987 A. Which compound do you suspect is the most volatile? Why? B. Calculate the percent composition of component D.
The liquid-liquid extraction technique takes advantage of the solubility difference of a given compound in two immiscible solvents. Group of answer choices True False
When pure furfural (solvent) is added to a mixture containing 0.2 mass fraction diphenylhexane and 0.8 mass fraction docosane, two separate layers can be obtained. If the composition of the two layers are as shown in the table, how much solvent was added to 500 kg of solution of docosane and diphenylhexane?
Conc. of NaOH: TRIAL 1 TRIAL 2 TRIAL 3 Mass of flask 81.061 g 69.692 g 96.039 g Mass of flask and vinegar 83.010 g 71.578 g 97.940 g Mass of vinegar 1.949 g 1.886 g 1.901 g Volume of vinegar 2.00 mL 2.00 mL 2.00 mL Initial buret reading Final buret reading 17.0 mL 17.5 mL 16.0 mL Volume of NaOH delivered 17.0 mL 17.5 mL 16.0 mL Moles of NaOH delivered 0.0325 moles 0.0314 moles 0.0317 moles Moles of acetic acid in vinegar 0.0016 moles 0.0016 moles 0.0016 moles Mass of acetic acid in vinegar 0.097 g 0.094 g 0.095 g Molarity of acetic acid in vinegar 0.811 M 0.785 M 0.791 M Average molarity of acetic acid 0.796 M % by mass of acetic acid in vinegar Average % mass of acetic acid in vinegar Standard deviation of % mass acetic acid
In chromatography, the compound that is least soluble in the mobile phase a) Travels the furthest away from the line of origin b) Stays closest to the line of origin
A sample of rainwater was collected from four separate locations across theMetroplex. Each sample was measured once by two separate methods for the presence ofsulfate. Determine whether the two methods are equivalent with respect to giving thesame answer for [SO42-].
hree components in a mixture have varying distribution constants between the mobile phase and the stationary phass One of the components has a very low distribution constant, Would this component likely elute first or last and how would you design an experiment or modify the components of the separation to make it perform in the opposite manner?
is water a good solvent for recrystallization for acetanilide based on the image?
The scatter plot below shows the density of ethylene glycol solutions vs. the mass % of those solutions. Density (g/mL) 1.04+ 1.03- 1.02- 1.01 0.99- 0.98- 8 % 10 12 14 16 18 20 Mass % Q The equation for the line of best fit shown on the scatter plot is y= 0.001683 +0.9959. Use the equation of the trendline to determine the mass percent of an ethylene glycol solution with a density of 1.015 g/mL.
Calculate the - total number of moles of oxalate ions (sources are oxalic acid solutions and potassium oxalate monohydrate is 0.0186 moles) - total number of moles of Fe3+ ions (source is ferrous ammonium sulfate hexahydrate, FeSO4(NH4)2SO4.6H2O)

SEE MORE QUESTIONS

Recommended textbooks for you

Fundamentals Of Analytical Chemistry

Chemistry

ISBN:

9781285640686

Author:

Skoog

Publisher:

Cengage

Appl Of Ms Excel In Analytical Chemistry

Chemistry

ISBN:

9781285686691

Author:

Crouch

Publisher:

Cengage

Macroscale and Microscale Organic Experiments

Chemistry

ISBN:

9781305577190

Author:

Kenneth L. Williamson, Katherine M. Masters

Publisher:

Brooks Cole

Physical Chemistry

Chemistry

ISBN:

9781133958437

Author:

Ball, David W. (david Warren), BAER, Tomas

Publisher:

Wadsworth Cengage Learning,

Fundamentals Of Analytical Chemistry

Chemistry

ISBN:

9781285640686

Author:

Skoog

Publisher:

Cengage

Appl Of Ms Excel In Analytical Chemistry

Chemistry

ISBN:

9781285686691

Author:

Crouch

Publisher:

Cengage

Macroscale and Microscale Organic Experiments

Chemistry

ISBN:

9781305577190

Author:

Kenneth L. Williamson, Katherine M. Masters

Publisher:

Brooks Cole

Physical Chemistry

Chemistry

ISBN:

9781133958437

Author:

Ball, David W. (david Warren), BAER, Tomas

Publisher:

Wadsworth Cengage Learning,

SEE MORE TEXTBOOKS

GET THE APP

About FAQ Academic Integrity Sitemap Document Sitemap

Contact Bartleby Contact Research (Essays)High School Textbooks Literature Guides Concept Explainers by Subject Essay Help Mobile App

GET THE APP

Privacy

Your CA Privacy Rights

Your NV Privacy Rights

Cookie Policy

About Ads

Manage My Data

bartleby, a Learneo, Inc. business

Standard	Unknown sample
Component	Weight used (mg)	Raw Peak Area	Component	Raw Peak Area
Ethanol	498.3	5104	Ethanol	3495
Hexane	756.4	9285	Hexane	3267
Benzene	412.7	4374	Benzene	2894
Ethyl acetate	628.9	7239	Ethyl acetate	5402