50PercentageRed No. 40 Soln100%80%60%40%Table 4.1: Dilutions of Red No. 40 & AbsorbanceVolume of Red No. 40Soln (mL)10me8mLопи4mLPercentageRed No. 40 Soln100%80%60%40%20%Volume of DI Water(mL)OML2mLLIMLMUML8MLTable 4.2: Dilutions of Red No. 40 & AbsorbanceConcentration Red No. 402. Report the wavelength with the maximum absorbance of Red No. 40 dye.Absorbance20%2MLPart A: Making a Calibration Curve for Beer's Law1. Calculate the concentrations of each of your diluted Red No. 40 solutions and add these to Table 4.2. Showat least one sample calculation in the space below.0.2510.192Total Volume0.1810·1190.060(mL)10 mL10 mL10 mL10 mL10 mL

Detailed answer shown belowExplanation: An experiment to measure the absorbance of Red No. 40 dye at…

Answered: 50 Percentage Red No. 40 Soln 100% 80%…

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Caffeine (C8H10O2N4 • H2O) has an absorbance of 0.510 at 272 nm and 1 cm optical path in1 mg / 100 mL concentration solutions. A 2.5 g sample of soluble coffee is diluted withwater to 500 mL. Take 250 mL, add 25.0 mL of 0.1 N H2SO4 and dilute it to 500 mL. Theabsorbance at 272 nm resulting in 0.415. A) Calculate the grams of caffeine per kg of soluble coffee in the sample. Themolar mass of caffeine is 212 g / mol.
The absorbance of a cationic iron(II) sample solution was measured in a spectrophotometer, but the instrument returned an error because the absorbance was too high. The sample was then diluted by using a pipette to take 100.0 μLμL of the sample and injecting it into a cuvette already containing 2.00 mLmL of water (total volume is 2.00 mLmL + 100.0 μLμL). The absorbance value of the diluted solution corresponded to a concentration of 7.71×10−6 M M . What was the concentration of the original solution? Express the concentration to three significant figures with the appropriate units.
1-11 Exactly 5.00-mL aliquots of a solution containing phenobarbital were measured into 50.00-mL volumetric flasks and made basic with KOH. The following volumes of a standard solution of phenobarbital containing 2.000 µg/mL of phenobarbital were then introduced into each flask and the mixture was diluted to volume: 0.000, 0.500, 1.00, 1.50, and 2.00 mL. The fluorescence of each of these solutions was measured with a fluorometer, which gave values of 3.26, 4.80, 6.41, 8.02, and 9.56, respectively. (a) Plot the data. *(b) Using the plot from (a), calculate the concentration of phenobarbital in the unknown.
Please choose an appropriate technique(s) to separate following compounds (it can be one, more than one, on none): Compound Melting Point Density Boiling Point Molar mass Phenol 40.5°C 1.07 g/cm 181.7°C 94.113 g/mol Toluene -95 °C 0.87 g/mL 111 °C 92.141 g/mol Simple Filtration Column Chromatography Distilation Crystallization/Re-Crystallization Separatory funnel None www. MacBook Air
Analysis was run on samples from a known CRM with 8.85% Fe. The following results for %Fe were obtained by an analyst: 8.75, 8.51, 8.25, 8.61. Which of the following statements is true assuming none of the data points are outliers? Group of answer choices Tcalc = 63.15 The analysis is not accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is accurate at the 95% confidence interval. Not enough information to determine Tcalc = 63.15 The analysis is accurate at the 95% confidence interval. Tcalc = 3.03 The analysis is not accurate at the 95% confidence interval.
6. A stock solution containing 25% w/v of chlorhexidine is used to prepare an antiseptic such that when the antiseptic is diluted 1 in 25, a 1 in 500 wash solution is obtained which is ready for use by the patient. What volume (ml) of the stock solution is required to prepare 5 litres of the antiseptic to fulfil a bulk manufacturing order?
-3 A 0.3202 (±0.0001) g sample of a pure monoprotic acid required 20.04 (±0.02) cm° of 0.1005 (±0.0005) mol dm neutralisation. Find the molar mass of the acid in g mol together with its uncertainty also in g mol, with an appropriate number of digits. NaOH for -1 Select one: a. 1.59 x 102+ 0.2 g mol b. 1.60 x 10 + 0.03 g mol C. 1.590 x 102 + 0.03 g mol d. 1.590 x 10- + 0.2 g mol 1.60 x 10-+0.2 g mol е. Clear my choice
Consider the following molecules. Which statement(s) is TRUE? CH3 CH3 но ČH3 но ČD3 i. You could differentiate between the two with a spot test. ii. You could differentiate between the two with liquid chromatography. iii. You could differentiate between the two with TLC. iv. You could differentiate between the two with a microcrystalline test. O a. i and iv only O b. ii and iii only O c. iii only O d. i only e. Neither i, ii, iii, nor iv are correct statements.
Purification table formula: A=Elc Absorption is 1.471 E= 27,000 (GFP) l= 1 cm 1.417=27,000 M^-1 (1 cm) (c) Given 5.44810^-5 M is the concentration convert the concentration units Molarity (mol/l) to mg molar mass of GFP is 27,000 g
The ethyl acetate (CH3COOC2H5) concentration in an alcoholic solution was determined by diluting a 10.00-mL sample to 100.00 mL. A 20.00-mL aliquot of the diluted solution was refluxed with 40.00 mL of 0.04672 M KOH: ethyl acetate.JPG After cooling, the excess KOH was back-titrated with 3.85 mL of 0.04644 M H2SO4. Calculate the %(w/v) CH3COOC2H5 in the alcoholic solution. MM CH3COOC2H5: 88.11 MM NaOH: 40.00 MM H2SO4: 98.08
1. A wastewater sample has the following composition: NO3 = 37 mg/L as N CO3²-2.5 x 10 mol/L PO4³ = 10 meq/L Ca²+ = 75 mg/L as CaCO3(s) Express each of the above concentrations in mg/L, mol/L, meq (of charge)/L, and ppm. Make and list any necessary assumptions. Show your work and summarize the results in a table.
Three labs were contracted to measure the concentration of a 5.50 ppm Ca2* standard solution. They each measured the solution 3 times, and their results are as follows: Measurement 1 Measurement 2 Measurement 3 Laboratory 1 5.47 ppm 5.54 ppm 5.50 ppm Laboratory 2 5.32 ppm 5.44 ppm 5.56 ppm Laboratory 3 5.61 ppm 5.62 ppm 5.60 ppm Select ALL of the TRUE statements about the measurement capabilities of these labs. Lab #3 was the most precise. Lab #1 was the most precise. Lab #1 was the most accurate. Lab #2 was the most precise. O.Lab #2 was the most accurate. Lab #3 was the most accurate.

SEE MORE QUESTIONS

Recommended textbooks for you

Chemistry

ISBN:

9781305957404

Author:

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:

Cengage Learning

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

Chemistry

ISBN:

9781305957404

Author:

Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:

Cengage Learning

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

SEE MORE TEXTBOOKS