If the equation of the calibration curve for caffeine at 230 nm is A-0.0265c and the concentration units for the calibration curve is ppm and the path length is b-1 cm. What is the absorptivity for caffeine in L/mg cm? Report your answer to 4 decimal points

If the equation of the calibration curve for caffeine at 230 nm is A-0.0265c and the concentration units for the calibration curve is ppm and the path length is b-1 cm. What is the absorptivity for caffeine in L/mg cm? Report your answer to 4 decimal points

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter14: Chromatography

Section: Chapter Questions

Problem 9P

See similar textbooks

Related questions

Q: What is the maximum orbital degeneracy of orbitals in the following point groups: (a) C₂v (b) Td (c)…

A: The orbital degeneracy of molecular orbitals in different point groups is determined by the…

Q: Suppose a 500. mL flask is filled with 1.9 mol of H₂ and 0.50 mol of HC1. The following reaction…

Q: For each row in the table below, decide whether the pair of elements will form a molecular or ionic…

A: A molecule compound is formed by the formation of covalent bonds between the atoms. A molecule is…

Q: Draw the major product of this reaction. Ignore inorganic byproducts. 1. BH3-THF 2. H2O2, NaOH

A: Given,The reaction is:

Q: Analyze the chemical equation below: C₂H5NH₂ is a CHNH,(m + H_O + C_HNH* is C₂H5NH3*. Its strong…

A: Check that the given compound is weak base and acid. Choose the correct option to complete the…

Q: 2. Write in all the product(s) of this reaction. Label them as "major" or 'minor". OH CH₂ H₂SO, heat

A: Alcohol gives dehydration reactions when it reacts with a strong acid like H2SO4 or H3PO4 to form an…

Q: Ignoring sp3 CH stretching, estimate where the major peak be in the following compound's IR.…

A: IR spectroscopy is used to determine the functional groups present in the sample. Different…

Q: Some measurements of the initial rate of a certain reaction are given in the table below. [N₂] [H₂]…

A: Given,

Q: Classify each molecule as polar or nonpolar. Electrons on the outer atoms are omitted for clarity.…

A: If the electronegativity of the covalent bond forming atoms is different then the higher…

Q: 4. What are the expected major products for the following reactions? A) B) NBS, H₂O₂ NBS, H₂O₂

Q: Hard water often contains dissolved Ca²+ and Mg2+ ions. One way to soften water is to add…

A: Given,Molarity of CaCl2 = 0.055 MMolarity of Mg(NO3)2 = 0.090 Mvolume of the solution = 1.0 L

Q: Draw the thermodynamic product for the reaction

A: Alkene reacts with hydrochloric acid to form stable carbocation first, followed by a reaction with…

Q: Predict the major product for the following reaction: O CH₂ NH₂ -N [H+] (-H₂O) Modify the given copy…

A: Ketone reacts with amine in acidic medium to produce imine as the product.

Q: Consider the following electrophilic aromatic substitutions of benzene. What are the conditions for…

A: Note: Since you have posted a question with multiple sub parts, we will provide the solution only to…

Q: Predict the major product(s) of the following reactions (indicate stereochemistry when relevant) and…

A: Alkyl halides give a solvolysis reaction with ethanol to form an ether.

Q: 6. The following substance is expected to have good solubility in which of the following solvent(s)?…

A: *Sodium benzoate is a sodium salt of benzoic acid. It soluble in water (62.7 gm per 100ml) to form…

Q: Which of the following can be used to elute His-tagged proteins in metal ion chromatography? 1) 2)…

A: His-tagged proteins generally contain six to nine histidine residues in the N or C terminus of the…

Q: Questior Draw four additional valid resonance contributing structures for the compound depicted…

A: A question based on introduction to organic chemistry.. The structure of a cyclic compound is given…

Q: Methanol can be synthesized by combining carbon monoxide and hydrogen. CO(g) + 2H₂(g) CH3OH(g) A…

A: Le Chatelier's principle states that if an equilibrium is disturbed by changing the conditions, then…

Q: A catalyst decreases the activation energy of a particular exothermic reaction by 33 kJ/mol, to 25…

A: Activation energy of catalyzed reaction = 25 kJ/molActivation energy difference between the…

Q: . Provide the product and an arrow pushing mechanism for the reaction shown below. MeOk then شد

A: Given is organic reaction.This is Aldol addition reaction.In this reaction aldehyde or ketone reacts…

Q: The standard emf for the cell using the overall cell reaction below is +0.48 V: Zn(s) + Ni2+ (aq) →…

A: Standard emf of cell = 0.48 VCell reaction : and [Ni2+] =0.100 M and [Zn2+] =1.50 MWe need…

Q: Choose the major product of the following reaction. HBr 50 °C ? Br 3 Br

A: HBr adds across unsymmetrical double bonds following the Markovnikov rule. 1,2- and 1,4- addition…

Q: For each solute, click the button under the better solvent. HO- - solute CaCl₂ CH₂ CH₂-OH 1₂ Which…

A: For each solute which is better solvent given below with explanation.

Q: Explain in detail why the following reaction will produce the indicated product in negligible…

A: This is Aldol condensation reaction. Based on the stability of carbeneanion produced, this reaction…

Q: Draw a structural formula of the SS configuration of the compound shown below. S S

A: Given is organic compound.Given compound has two stereocenters.Both stereocenters have S,S…

Q: An SN2 mechanism takes place when 3-(bromomethyl)pentane is added to each nucleophile listed below.…

A: Sn2 reaction is biomolecular nucleophilic substitution reaction.Sn2 is single step reaction i.e.…

Q: Nitroglycerin is a dangerous powerful explosive that violently decomposes when it is shaken or…

A: 1. The chemical reaction is the decomposition of liquid nitroglycerin to gaseous dinitrogen, gaseous…

Q: A student made measurements on some electrochemical cells and calculated three quantities: . The…

A: The standard reaction free energy and the cell potential under standard conditions are related as…

Q: A mixture of gaseous reactants is put into a cylinder, where a chemical reaction turns them into…

A: Given : heat flows into the system, Q = +191 KJ where positive sign of heat indicates it is added to…

Q: proceed? Part1: C/.. answer=[Select] part2: CH3 answer= [Select] NaOH CH3OH OCH₂CH3 + -> ? NaCN

A: The first reaction is goes via SN1 and second reaction is goes via SN2 reaction mechanism.SN1 and…

Q: Of the following, which atom has the smallest atomic radius? OK C Se Cu Ti

A: It increases as we move down the group because of the increase in shell number.It decreases as we…

Q: Solve for the pH of a 0.0160 M solution of C6H5NH₂ For C6H5NH₂: Kb = 4.0 * 10-10 2.81

A: Concentration of C 6 H5 NH 2 = 0.0160M Kb = 4.0×10-10pH of the solution=?

Q: 5. Identify the reagent (and its concentration) that is used to confirm the presence of each of the…

A: The question is related to the Inorganic qualitative analysis.

Q: Density (Brix) 2.5 2 2 2 0.5 Density vs. Sugar Concentration 10 Sugar Concentration (g/L) 15 y =…

A: Given question related to calculation of density from the given graph.

Q: Calculate the energy (in kJ) required to heat 0.142 grams of water from -46.1 °C to -6.8 °C.

A: Answer:Here:

Q: Please don't provide handwritten solution .....

A: Step 1:The concentration of H+ in a solution or pure water varies by adding an acid or a base. Since…

Q: Use the Strategy Problem 22 Do the following compounds have the R or the S configuration? 8 a. Br H…

A: For R and S configuration following steps are required->First of all give numbering to all atoms…

Question

Please don't provide handwritten solution ....

If the equation of the calibration curve for caffeine at 230 nm is A-0,0265c and the concentration units for the calibration curve is ppm and the path length is
b-1 cm. What is the absorptivity for caffeine in L/mg cm? Report your answer to 4 decimal points
Type your answer...

Expert Solution

This question has been solved!

Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.

SEE SOLUTION Check out a sample Q&A here

Step 1: Given information:

VIEW

Step 2: Calculation of absorptivity:

VIEW

Solution

VIEW

Step by step

Solved in 3 steps with 3 images

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Learn more about

Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, chemistry and related others by exploring similar questions and additional content below.

Similar questions

25 ml of pickled brine was taken from an apple pickled with vinegar and diluted to 500 ml, 25 ml of this was taken and acidity was determined with 0.2 N (Factor: 1.05) NaOH. In the main trials, 6.3 ml - 6.5 ml - 6.9 ml, respectively, 0.1 ml base was used in the analysis without using the sample.For example, how many ppm is its acidity?
From the calibration curve (yellow table calibration data) calculate the concentration of sugar in solution
Sheet 5 From the following data determine the following: Define outlier and then identify the outlier in the data. Determine if the outlier should be kept of discarded from the data. Trial 1 2 3 4 HCl (mL) 22.3 28.4 29.8 29.3 NaOH (mL) 35.2 35.1 34.9 35.0
Hello, Can you please answer these 3 questions? Thank you!
Determine the concentration of linalool in a highly valued lavender essential oil. The peak areas of a series of standard solutions (calibrations standards) acquired from GC-MS (gas chromatography-mass spectrometry) is presented below. Concentration (mg/L) Peak area 0 201 25 5214 50 14658 75 23647 100 32657 125 42652 150 52478 QUESTION: Calculate the concentration of linalool in yourhighly valued lavender essential oil which returns a peak area of 27235.
An analysis of city drinking water for total hardness was done by two students in the laboratory and produced the following results (in ppm CaCO3): Student A: 228.3, 226.4, 226.9, 227.1, and 228.6. Student B: 229.5, 226.1, 230.7, 223.8, and 227.5 what is the coefficient variation?
The sample containing 4.2 % NaCl will be determined gravimetrically as AgCl. What weight (in milligrams) of the sample must be taken to obtain a precipitate that will weigh about 0.39 mg? FM: NaCl = 58.44 AgCl = 143.3 %3D Answer in two decimal places. Do not include units in the answer. Answer:
Q1: The following are relative peak areas for chromatograms of standard solutions of methyl vinyl ketone (MVK) MVK concentration mmol/L 0.5 Relative peak area 3.76 1.5 9.16 2.5 15.03 3.5 20.42 4.5 25.33 5.5 31.97 A sample containing MVK yielded relative peak area of 21.3. Calculate the concentration of MVK in the sample.(use excel)
PS. Further values required for the solvings are give in the various situations below. (ANSWER) Situation: A community in a mountainous area of Bohol uses water collected from a nearby natural spring. A sample was submitted to a laboratory for the analysis of its total hardness. Required: SHOW YOUR COMPLETE CALCULATIONS. BASED ON THE IMAGE PROVIDED BELOW FOR THIS QUESTION: Calculate the amount of titrant used in each trial to reach endpoint. Report total hardness of the sample as mean ±sd. a. 250.0 mL of 500.0 ppm of CaCO3 solution from a primary standard (assume solvent is distilled water only). Answer : Mass of CaCO3 = 0.125 g b, The EDTA solution was standardized by titrating it with a 25.0 mL aliquot of the CaCO3 solution. How much of the titrant was consumed. Answer: Volume of EDTA consumed = 12.405 g c. Calculate the average titer (mg CaCO3/mL EDTA). Mass of CaCO3 in 25 mL CaCO3 solution: 0.0125 g Answer: 1.008 mg CaCO3/ mL EDTA
If an instrument gives a response of 1240 for a standard containing 8 ppm of a substance, how much if this substance is in a sample that gives a response of 1705? Are any assumptions needed?
percentage purity of an ibuprofen sample was determined by a reversed phase HPLC method as follows: Y Der ● A calibration curve of peak area versus concentration (ug/mL) of pure ibuprofen was constructed The ibuprofen sample for analysis was prepared by taking 10.0204 g of powder and dissolving it in/1Lbf distilled water (solution A). 1 ml of the latter solution was further diluted to IL with distilled water (solution B). Solution B was analysed by HPLC analysis Results The equation for the best-fit line of the calibration curve is: y=26820x-1323.8. ● The average peak area for the ibuprofen sample (solution B) was 266796.2 Calculate the percentage purity of the ibuprofen powder.
A lab pair’s Beer’s Law calibration graph 0.08 < A < 0.79 had a best-fit line of A = 0.013 C – 0.023. Data was: off-scale for both the stock solution and solution #1 (10.00 mL stock diluted to 25.00 mL); solution #2 (1.00 mL stock diluted to 25.00 mL) had A = 0.85, and solution #3 (1.00 mL of solution #1 diluted to 25.00 mL) had A = 0.73. What are the concentrations of solution #3 and the stock solution?