Organic Chemistry (8th Edition)
8th Edition
ISBN: 9780134042282
Author: Paula Yurkanis Bruice
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Question
Chapter 13.23, Problem 40P
Interpretation Introduction
Interpretation
Estimate the pK4 of the acid has to be calculated.
Concept introduction:
UV/vis spectroscopy: It is deal with information about various compounds that have conjugated double, the UV light and visible light have jest the right energy to cause an electronic transition in a molecule that is to promote an electron from one molecular orbital to another higher energy.
Henderson-Hesselbalch equation: The acid lose a proton in an aqueous solution depends on the both the
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The absorbance of a solution of a weak acid was measured in the same condoitions under a series of pH values. Its conjugate base is the only species in the solution that absorbs UV light at the wavelength used. Estimate the pKa of the acid from the data obtained
The molar absorptivity for the FD&C dye “Red No. 3” (Erythrosine) 8.25104 M‒1·cm‒1 at 526 nm. Calculate the expected absorbance of solution of Red No. 3 with a concentration of 4.00×10–6M when measured at 629 nm in a 2.00 cm cell.
Estimate the Ka of a weak acid from the data given below. One gram quantities of
the acid were dissolved in equal quantities of the various buffer solutions and all
solutions were measured under the same conditions. The anion of the acid is the
only species that absorbs at the wavelength used.
pH:
Abs:
4
0.0
5
0.0
6
0.06
7
0.39
8
0.95
9
1.13
10
11
1.18 1.18
Chapter 13 Solutions
Organic Chemistry (8th Edition)
Ch. 13.1 - Which of the following fragments produced in a...Ch. 13.2 - What distinguishes the mass spectrum of...Ch. 13.2 - What is the most likely m/z value for the base...Ch. 13.3 - Prob. 5PCh. 13.3 - a. Suggest possible molecular formulas for a...Ch. 13.3 - If a compound has a molecular ion with an...Ch. 13.3 - Identify the hydrocarbon that has a molecular ion...Ch. 13.4 - Predict the relative intensities of the molecular...Ch. 13.5 - Which molecular formula has an exact molecular...Ch. 13.5 - Prob. 11P
Ch. 13.6 - Sketch the mass spectrum expected for...Ch. 13.6 - The mass spectra of 1-methoxybutane,...Ch. 13.6 - Primary alcohols have a strong peak at m/z = 31....Ch. 13.6 - Identify the ketones responsible for the mass...Ch. 13.6 - Prob. 16PCh. 13.6 - Using curved arrows, show the principal fragments...Ch. 13.6 - The reaction of (Z)-2-pentene with water and a...Ch. 13.9 - a. Which is higher in energy: electromagnetic...Ch. 13.9 - Prob. 20PCh. 13.13 - Prob. 21PCh. 13.14 - Which occur at a larger wavenumber: a. the C O...Ch. 13.14 - Prob. 23PCh. 13.14 - Prob. 24PCh. 13.14 - Rank the following compounds from highest...Ch. 13.14 - Which shows an O H stretch at a larger...Ch. 13.16 - Prob. 27PCh. 13.16 - a. An oxygen-containing compound shows an...Ch. 13.16 - Prob. 29PCh. 13.16 - For each of the following pair of compounds, name...Ch. 13.17 - Which of the following compounds has a vibration...Ch. 13.17 - Prob. 32PCh. 13.18 - A compound with molecular formula C4H6O gives the...Ch. 13.20 - Prob. 34PCh. 13.20 - Prob. 35PCh. 13.21 - Predict the max of the following compound:Ch. 13.21 - Prob. 37PCh. 13.23 - a. At pH = 7 one of the ions shown here is purple...Ch. 13.23 - Prob. 39PCh. 13.23 - Prob. 40PCh. 13 - In the mass spectrum of the following compounds,...Ch. 13 - Prob. 42PCh. 13 - Draw structures for a saturated hydrocarbon that...Ch. 13 - Rank the following compounds in order of...Ch. 13 - For each of the following pairs of compounds,...Ch. 13 - a. How could you use IR spectroscopy to determine...Ch. 13 - Assuming that the force constant is approximately...Ch. 13 - Norlutin and Enovid are ketones that suppress so...Ch. 13 - In the following boxes, list the types of bonds...Ch. 13 - A mass spectrum shows significant peaks at m/z. =...Ch. 13 - Prob. 51PCh. 13 - Prob. 52PCh. 13 - Prob. 53PCh. 13 - The IR spectrum of a compound with molecular...Ch. 13 - Rank the following compounds from highest...Ch. 13 - Rank the following compounds from highest...Ch. 13 - What peaks in their mass spectra can be used to...Ch. 13 - Prob. 58PCh. 13 - Which one of the following five compounds produced...Ch. 13 - Prob. 60PCh. 13 - Each of the IR spectra shown below is accompanied...Ch. 13 - Prob. 62PCh. 13 - Prob. 63PCh. 13 - How can IR spectroscopy distinguish between...Ch. 13 - Prob. 65PCh. 13 - Prob. 66PCh. 13 - Give approximate wavenumbers for the major...Ch. 13 - Prob. 68PCh. 13 - Which one of the following live compounds produced...Ch. 13 - Phenolphthalein is an acid-base indicator. In...Ch. 13 - Prob. 71PCh. 13 - How can you use UV spectroscopy to distinguish...Ch. 13 - Prob. 73PCh. 13 - The IR and mass spectra for three different...
Knowledge Booster
Similar questions
- 1.) Beer's Law can be used to find the concentration of a solution by measuring its absorbance. The law is given by ?=???A=ϵbC Where A is the absorbance, ?ϵ is the molar absorptivity, b is the pathlength of the light (the width of the sample cell), and C is the concentration of the solution. A student is analyzing a solution of a metal, and finds that the absorbance of the solution is 0.532. If ?=187 L⋅g−1⋅cm−1ϵ=187 L⋅g−1⋅cm−1 and ?=1 cmb=1 cm , what is the concentration of the metal in solution (in g/L)? * 352 * 2.84×10−32.84×10−3 * 2.84×10−22.84×10−2 * 96.8 2.) How many significant figures does the number 0.00358 have? Group of answer choices a.1 b.2 c.3 d.5 3.) A 10.00 mL solution of a certain food dye has a concentration of 1.47 g /L. What is the total mass of food dye in the solution? Report your answer with the correct number of significant figures.arrow_forwardThe concentration of a dilute aspirin solution is 0.000530 M 0.000530 M . Standard solutions of this compound were used to prepare a Beer's law plot which gives a slope of 1550.1 M −1 1550.1 M − 1 . What is the expected absorbance value for the aspirin solution?arrow_forwardA student prepared four standard solutions of (NH4)2Fe(SO4)2 and measured their absorbance at 505 nm. She created a calibration plot with the best-fit line of y = 9372 x + 0.0539. She measured the absorbance of her diluted unknown sample solution as (4.69x10^-1) nm. If she prepared her diluted sample solution by diluting 10.00 mL of the original solution to a total volume of 50.00 mL with deionized water, what is the concentration of Fe2+ in her original solution? Answer in units of M. Note: Your answer is assumed to be reduced to the highest power possible.arrow_forward
- Absorbance at 453 nm 8393939 7 fl. oz./20 ml Beer-Lambert's Law (Spectrophotometry) #1 Fe (aq) + KSCN(s) FESCN "(aq) + K" (aq) 3+ To determine the moles of Fe (aq) in a 100. mL sample of an unknown solution, excess KSCN(s) is added to convert all the Fe (aq) into the dark red species FeSCN"(aq), as represented by the equation above. The absorbance of FESCN"(aq) at different concentrations is shown in the graph below. 2+ 0.50 目0.40 0.30 0.20 01 0. 0. 5 x 10-5 10 x 10-5 Concentration of FESCN2+ (M) If the absorbance of the mixture is 0.20 at 453 nm, haw many moles of Fe (aq) were present in the 100. mL sample? (Assume that any volume change due to adding the KSCN(s) Iis negligible.) 3+, 4x10-4 mol 3 x 104 mol (B) 4x 10-6 mol 3x 10-6 molarrow_forwardWhat is the absorbance of a 2.33×10−4M2.33×10−4M solution of a compound with a molar absorptivity of 1.05×103M−1cm−11.05×103M−1cm−1 in a 1.00 cm cell?arrow_forwardThe standard curve was made by spectrophotographic analysis of equilibrated iron(III) thiocyanate solutions of known concentration. You are asked to analyze a Fe(SCN)2+ solution with an unknown concentration and an absorbance value of 0.392. The slope-intercept form of the equation of the line is y = 4538.1x +0.0077. The unknown was analyzed on the same instrument as the standard curve solutions at the same temperature. What is the Fe³+ concentration of the unknown solution? [Fe³+] = mol/L Absorbance Iron(III) thiocynate standard curve 1.0 V 0.5 0.0001 Fe³+ concentration (M) 0 0.0002arrow_forward
- The intensity of red light (680 nm) and sorted by a solution of green dye was found to be 1.99 V and the intensity of light when no dye was present (the blank) was found to be 2.69 V.What is the absorbable of the solution of green dye in three significant figuresarrow_forwardIn an analytical laboratory a chemical compound namely Paracetamol (151.163 g/mol) is determined in a sample. A sample weighing 0.0295 g was dissolved in a solvent and diluted the solution to 1 L. The solution has λ max at 243 nm (ε=2.6×104 cm-1 mol-1 L). The solution exhibits an absorbance of 0.638 in a 2 cm cell. Calculate the percentage paracetamol in the sample.arrow_forward4. An ethanol solution of p-aminosalicylic acid has a molar absorptivity of 1.6 x 10ʻL mol"cm at a wavelength of 284 nm. Calculate the absorbance of a 4.8 x 10°M solution in a 1.000 cm cuvette at this wavelength.arrow_forward
- The absorbance of an unknown dye solution is measured to be 0.47 by a spectrometer. The linear equation of the spectrometer's calibration plot is y= 2156.5 x +0.0213, where y represents absorbance and x represents concentrations of dye. What is the molar concentration of the unknown sample (in mole L)? O2.08e4 O 2.08e-4 0 125e3 0 125e-3arrow_forwardA sample of drinking water is analyzed colorimetrically for ammonia nitrogen concentration. If the sample colour when viewed through a depth of 5.5 cm corresponds in intensity to a 1 mg/L standard sample when viewed through a depth of 40 cm, what is the concentration of ammonia nitrogen in the sample?arrow_forward(d) The Beer-Lambert law states that the absorbance (A) of light by a solution in a cuvette is given by: 10 A = In == ECL where lo is the incident light intensity, is the transmitted light intensity, e is the molar absorptivity, c is the concentration of the solution, and L is the path length of the cuvette. (1) Light with a wavelength of 800 nm is passed through a cuvette containing a solution of Coumarin dye. After passing through the cuvette, the light intensity was reduced to 10% of its initial value. What is the absorbance of the solution of Coumarin dye? (ii) The concentration of the Coumarin dye is 0.004 mol dm3, and the cuvette has a path length of 1 cm. What is the molar absorptivity of Coumarin dye at 800 nm, in units of m² mot¹? (IT) The molar absorptivity of Coumarin dye at 400 nm is three times larger than at 800 nm. How would the absorbance of the solution change, when measured with 400 nm light rather than 800 nm light?arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
ChemistryChemistryISBN:9781305957404Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCostePublisher:Cengage Learning
ChemistryChemistryISBN:9781259911156Author:Raymond Chang Dr., Jason Overby ProfessorPublisher:McGraw-Hill Education
Principles of Instrumental AnalysisChemistryISBN:9781305577213Author:Douglas A. Skoog, F. James Holler, Stanley R. CrouchPublisher:Cengage Learning
Organic ChemistryChemistryISBN:9780078021558Author:Janice Gorzynski Smith Dr.Publisher:McGraw-Hill Education
Chemistry: Principles and ReactionsChemistryISBN:9781305079373Author:William L. Masterton, Cecile N. HurleyPublisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...ChemistryISBN:9781118431221Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. BullardPublisher:WILEY
Chemistry
Chemistry
ISBN:9781305957404
Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste
Publisher:Cengage Learning
Chemistry
Chemistry
ISBN:9781259911156
Author:Raymond Chang Dr., Jason Overby Professor
Publisher:McGraw-Hill Education
Principles of Instrumental Analysis
Chemistry
ISBN:9781305577213
Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch
Publisher:Cengage Learning
Organic Chemistry
Chemistry
ISBN:9780078021558
Author:Janice Gorzynski Smith Dr.
Publisher:McGraw-Hill Education
Chemistry: Principles and Reactions
Chemistry
ISBN:9781305079373
Author:William L. Masterton, Cecile N. Hurley
Publisher:Cengage Learning
Elementary Principles of Chemical Processes, Bind...
Chemistry
ISBN:9781118431221
Author:Richard M. Felder, Ronald W. Rousseau, Lisa G. Bullard
Publisher:WILEY