A relationship between concentration in mg/dL and light absorption in absorbance units is given by the equation: y = 1.2x + 0.28. If concentration is graphed on the x-axis and absorbance is on the y-axis, determine the concentration in mg/dL for a sample with an absorbance value of 0.94

A relationship between concentration in mg/dL and light absorption in absorbance units is given by the equation: y = 1.2x + 0.28. If concentration is graphed on the x-axis and absorbance is on the y-axis, determine the concentration in mg/dL for a sample with an absorbance value of 0.94

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter25: Instruments For Optical Spectrometry

Section: Chapter Questions

Problem 25.6QAP

See similar textbooks

Related questions

Q: absorbance 0.8 0.7 y 1.4x- 0.01. 0.6 0.5 0.4 0.3 0.2 0.1 0.1 0.2 0.3 0.4 0.5 0.6 Concentration…

A: In the absorbance vs concentration graph : x-axis represents the concentration of sample. y-axis…

Q: A beaker containing a liquid is left to sit undisturbed overnight. In the morning, there are no…

A: Interpretation - When a beaker containing a liquid is left to sit undisturbed overnight. In the…

Q: Q1. The optical microscope can be used to generate magnified images of particles within a resolution…

A: ✓The resolution of an optical microscope is defined as the shortest distance between two points on a…

Q: Consider you have aqueous bluish copper (11) chloride and Zn metal. Describe the given materials as…

A: Matter is a substance that has a defined mass and shape and possess energy in certain form. It is…

Q: A Cu2+ solution obtained by dissolving a 3.1871-g penny in 500 mL of nitric acid has an absorbance…

A: Given : Mass of penny = 3.1871 g Volume of solution = 500 mL = 0.500 L…

Q: If a cylindrical rod of brass 150.00 mm long and 10.000 mm in diameter is heated from 30°C to 110°C…

Q: 1. The proportionality constant between an instrument readout and concentration is 54.2.…

A: Given, The proportionality constant of the instrument = 54.2

Q: Assume that we want to construct a confidence interval. Do one of the following, as appropriate (a)…

Q: What is the importance of the following analytical methods in chemical analysis? i. UV-vis…

Q: A series of standards were analyzed which gave the following results SOLUTION % Transmittance 0 mL…

A: Beer-Lambert Law: The absorbance (A) is proportional to the concentration (c) of the solution and…

Q: 125 120 115 110 105 100 95 30 4000 3500 3000 2500 2000 1500 1000 %Transmittance 3853.91 3838.77…

A: The question is based on the concept of IR Spectroscopy. we have to assign peaks to different bonds.

Q: LOD 4D00 3000 1500 1000 波数/cmr 3424 41 2680 8B 1460 74 60 1443 1240 74 1174 15 849 63 774 35 3346 26…

Q: What is the difference between a primary and a secondary standard? Give an example of each.

A: Primary Standard Solution: Primary standard solutions are solutions made out of primary standard…

Q: Which of the following variables does absorbance not depend upon? A. Molar absorptivity of the…

Q: Table 2 Absorbance vs CoCl2 concentration Test Tube Number Cobalt Chloride Concentration…

Q: What is the absolute error on the calculated milligrams of iron in this sample? a. ± 10 mg b. ±3 mg…

A: No of moles = Molarity * Volume (L) Mass = Moles * Molar mass

Q: For the data below, Write the linear equation of the line (use 5 Decimal places and don't add…

Q: A 15X ocular lens used with a 100X objective lens would produce a total magnification of A. 25x…

A: Option D is correct answer. Simply the total magnification is given by the product of magnification…

Q: Describe the role played by the electron gun and the electric field in the mass spectrometer. State…

A: Mass spectrometry It is the instrumental method for the analysis of a compound's molecular weight.…

Q: Part A Suppose a straight 1.55 mm -diameter copper wire could just "float" horizontally in air…

Q: 1500 1003 <-2965 2014 8 1130 1452 1379 727 % TRANSMITTANCE 9 3283 1327 10 1108 1047 9821

A: IR mainly used to determine the functional group that are present in a molecule

Q: 80 75 70 65 60 55 50 15 10- 5. 3000 2500 2000 1500 1000 4000 3500 %Transmittance 45 20 3618.11…

A: The question is based on the concept of IR Spectroscopy. we have been given the spectra. we have to…

Q: Which option is a correct representation of the missing information in Figure 8? * 1- A…

A: In an organic reaction mechanism, a curved arrow represents the transfer of electrons. In an organic…

Q: The trendline for a calibration curve is y=4.299x+-0.0001. The absorbance of a solution of the…

A: The concentration of the unknown solution is 0.0189 uM.

Q: Part A pH = 8.77 Express your answer using two significant figures. Enter your answers numerically…

A: Part A pH = 8.77 pH = -log[H3O+] Log[H3O+] = -pH [H3O+] = antilog(-pH) = antilog(-8.77) [H3O+]…

Q: The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and…

A: The calibration curve equation given is, => y = 0.0699 x + 0.015 Where y = absorbance And x =…

Q: (b) Ce(IO3)4, 1.5 x 10 g/100 mL (o) Cd- sO 200 L00

Q: For Question 2 and 3 please refer to the following diagram. The following data and diagram represent…

A: The relation of concentration and absorbance can be find with the help of graph between them. Here…

Q: In a laboratory 100 mL of phosphorus solution with concentration 1,0 mg/L is needed when the…

A: On dilution concentration changes but no of moles remain same. So, M1V1 = M2V2 M1 = Concentration of…

Q: A dose of 5 milligrams of penicillin is administered to a patient. The absorption constant for…

A: The formula given to be used is C = C0e-kt where C0 = initial concentration k = absorption…

Q: Caffeine (C8H10O2N4 • H2O) has an absorbance of 0.510 at 272 nm and 1 cm optical path in 1 mg / 100…

Q: A sample was prepared by diluting 1 mL of a sample to 5 mL. The resulting solution has an…

A: Beer's Law plot-

Q: 965,00dm-1 1089.3 cm-1 903.48cm- 1030.21cm-1 1375.12cm-1 3063 273.67cm-1 1604.77cm 291.67cm-1 3027.…

A: IR region Above 1100 cm-1 to 4000 cm-1 streching frequency are observed. Below 1100 cm-1 bending…

Q: Using UV-Vis, the result of the absorption of coffee is shown in the graph. Pls. refer to the graph…

A: Since you have posted question with multiple sub-parts, we are entitled to answer the first 3 only.…

Q: What is the difference between a direct and inverse relationship?

A: In direct relationship, if we increase one quantity, the other quantity will also increases while in…

Q: 50.00 45.00 40.00- 36.00 30.00 3 25.00 20.00 15.00 10.00 5.00 MM CM 0.00 0.00 120 6.00 10.00 1 14.00…

A: Area of sorbitol peak is calculated in the following step.

Q: After determining the absorbance of several standards of known concentration, the trendline for a…

A: The equation for a straight line is given by y=mx+c where m is the slope and c is the y-intercept.…

Q: If the separation of two compounds was performed where the property being utilized to separate them…

A: If the separation of two compounds was performed where the property being utilized to separate them…

Q: Assume the data below was collected for two different sample solutions using the same experimental…

Q: For a certain analysis, the concentration of the analyte was determined using the model equation:…

A: Given: CA=Ssample-SblankkCA = Analyte concentrationSsample= Signal given by the sampleSblank= Signal…

Q: the value of the proportionality constant?

Q: Q1\ Differences between Optical Microscope and Electron microscope Q2\ Differences between TEM and…

A: Solution (1.) : An optical microscope is a tool used to study microbodies such as bacteria, fungus,…

Q: You are given three unknown samples stored in screw-capped containers and was told to analyse them.…

A: A nanoparticle is a small particle that has a size between 1 to 100 nanometres. As size of…

Q: Normal text Arial 11 BIUA 三三▼m 1 4. 6. Antacid Light violet 4-6 6.82 Shampoo Purple violet 2-6 5.93…

A: pH of a solution is defined as the negative logarithm of H3O+ ion concentration in aqueous solution.…

Q: You determine that your sample has a mass of 386 g and a volume of 20ml it also is fairly unreactive…

A: Mass of sample =386g Volume of sample = 20ml Density = Mass/volume =386/20…

Q: Use this method to calculate the molar concentration of "copper (II) sulfate" if it has a measured…

A: Welcome to bartleby !

Q: In an experiment with an Ostwald Viscometer, the times of flow of water and toluene are 45 s and…

Q: I'm stuck on this one. =( Using the Beer Law to calculate this solution. A standard solution has a…

A: Given the concentration of standard solution, C = 6 g/dL Absorbance of the standard solution, A =…

Q: Prepare two graphs, %T vs. Concentration and Absorbance vs. Concentration, using the data for the…

A: According to Beer-Lambert law the amount of light absorbed or transmitted when passed through a…

Concept explainers

Quantum Chemistry

Quantum chemistry deals with the properties of chemical systems and their reactions. The branch of chemistry which is more concerned with quantum chemistry is physical chemistry. It is a more sophisticated field of theoretical physics which is concerned towards the application of physical concepts towards various chemical aspects such as, formation of atoms, chemical structure descriptions, chemical bond strength, hybridization, conjugation etc. Quantum chemistry mainly studies the various states i.e., ground state, excited state, transition states of the individual atoms or molecules taking place during any chemical reaction. The laws of motion explained by various scientists, which are termed as “classical mechanics” were not acceptable in terms of electrons, protons, atoms, light etc. Thus, a new theory named “quantum mechanics” emerged to understand the basic framework of various atomic and subatomic particles.

Question

Expert Solution

This question has been solved!

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

This is a popular solution!

SEE SOLUTION Check out a sample Q&A here

Step 1

VIEW

Step 2

VIEW

Step 3

VIEW

Trending now

This is a popular solution!

Step by step

Solved in 3 steps

SEE SOLUTION Check out a sample Q&A here

Knowledge Booster

Introduction and Principles of Quantum Theory

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

The equation of your standard curve of absorbance versus concentration (mM) is y = 1.245x + 0.0012. You put a solution of unknown concentration into the Spec20 and get an absorbance value of 0.227, which lies within the standards used to make the standard curve. What is the concentration of the unknown solution in mM?
A standard curve of absorbance vs. concentration has a linear trendline of y = 0.56x + 0.987. Use this trendline to calculate the concentration of an unknown sample that has an absorbance of 1.245.
The nickel level in a soil sample was determined using AAS. A 3.0 g sample was dissolved in acid and then diluted to a total volume of 100.0 mL. The absorbance of this solution determined at a wavelength of 232 nm, was found to be0.3. Several standard solutions were tested under the same conditions and a calibration curve shown below was obtained. Calculate the mass of nickel in mg.
A researcher finds that a sample of an unknown solution, when placed in a 1.00 cm wide cuvette, absorbs approximately 70.0% of incident light. What is the absorbance of the solution?
A protein’s concentration can be determined spectrophotometrically by mixing it with an indicator called a Bradford reagent and measuring the amount of light absorbed by the protein. Use the plot below to determine the mass of protein (in micrograms, μμg ) in 100.0 mL of the solution if its absorbance is 0.398. A. 52 B. 3.1 C. 2.4 D. 0.52 E. 0.031
Complete the information on these tables: wavelength 470 nm conc Um absorbance % transmission 700 0.45 35.58% 500 0.32 47.78% 300 0.19 64.2% 100 0.06 86.23% wavelength 502 nm conc Um absorbance % transmission 700 1.08 8.37% 500 0.77 16.99% 300 0.46 34.57% 100 0.15 70.15% Which mathematical relationship is most useful to relate concentration to the amount of light passing through the solution? (% Transmission, or Absorbance), Why? How does the slope of the absorbance/concentration graph vary with wavelength? Is there an “optimum” wavelength for your KMnO4 sample?
(a) At which wavelengths did each solution have the highest % transmittance? (b) Do the wavelengths (at the highest % transmittance) match to the color of the solution in the visible light range? Why or why not? Purple: 380 – 450 nm Green: 495 – 570 nm
If a solution has an absorbance value of 0.325 at a wavelength of 450 nm, what is the percent transmittance of this solution at this wavelength?
In determining the amount of copper and the identity of the copper compound in the unknown sample, a 100-mL solution containing 120.8 mg of the sample was initially prepared. Then, 5.00 mL of this solution was pipetted and diluted with deionized water in another 100-mL volumetric flask. The absorbance of this diluted solution was determined three times at the analytical wavelength. The concentration of Cu is 12.0123 mg/L, what is the mass of Cu in the analyzed solution? the mass of Cu in the unknown sample?
The drug tolbutamide (MW 270.0g/mol), a treatment for type 2 diabetes, has a molar absorptivity of 703 /M/cm at 262nm. One tablet was dissolved in 250ml of water. A 10.0 ml aliquot of this solution was diluted to 100.00 ml in a volumetric flask. This diluted solution exhibited an absorbance of 0.275 at 262 nm in a 1.00 cm cell. What is the mass of tolbutamide in the tablet?
A sample of a colored analyte at a concentration of 3.60 ´ 10-3 mol/L shows 34.2 percent transmittance in a 2.00 cm cell. What is the value of a in the Beer’s law equation for this substance at the wavelength measured? If a sample of the colored analyte of unknown concentration gives an absorbance, A, of 0.520 in the same cell at the same wavelength, what is the concentration of the analyte in this solution?
Given that the percent transmittance of light through a sample was 27.6% what is the absorbance of the solution? Rounded to two sig figs.