An unknown food-dye is analyzed by the method used in this experiment. The bsorbance of 5 standard solutions is plotted vs. their concentration (molarity) and a traight line is obtained with the formula: bs 4.150x +0.08 %3D n unknown food-dye soluton is diluted and it's absorbance is found to be 0.65. That is the molarity of the diluted unknown, to two significant figures? o not type units with your answer.
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is…
A: Given, Percent transmittance value of solution A = 56 % Percent transmittance value of solution B =…
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is…
A: A question based on tools in analytical chemistry that is to be accomplished.
Q: The original solution was diluted by a factor of three, and then the absorbance of the diluted…
A: According to Lambert Beer law, the absorbance of a solution is directly proportional to its…
Q: Q1. Dissolved 0.273 grams of pure sodium oxalate (Na.C.O.) in distilled water and added sulfuric…
A: Normality of solution is equal to equivalents per litre. And Normality = n-factor × Molarity
Q: A copper(II) sulfate solution of unknown concentration is placed in a colorimeter and an absorbance…
A: Given: Absorbance of unknown solution = 0.46 Absorbance of 0.055 M solution = 0.34
Q: A 10.00-g sample containing an analyte was transferred to a 250-mL volumetric flask and į diluted to…
A: Solution - According to the question - Given - In the spiked sample, the signal is due to 10 ml of…
Q: The aim of this experimen solution on the distribution coefficient of a drug, in this case benzoic…
A:
Q: Experinent nome and dewical formaula Cobalt C1) nitkate Sulastance and Clemical frimula mm, 9/ mn…
A:
Q: Nitrite concentration is commonly determined by interpolation method using spectrophotometry (an…
A:
Q: What part fo chromatography is being descibe by the following?…
A: These all are the terms used in the chromatography.
Q: Suppose that a student collects the following spectrophotometric data to determine the relative…
A:
Q: A 25.00 mL sample of an aqueous solution Y is extracted with 50.00 mL of hexane. After extraction,…
A: Given data Volume of aqueous solution : Vaq = 25.00 mL Volume of organic solvent (hexane) : Vorg =…
Q: Alfred was tasked to synthesize at least 250.0 ppm of his novel gold nanoparticles (AuNP’s) to be…
A: The concentration of the solution is parameter that describes the amount of a substance in solution…
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is…
A: Given, Percent transmittance of solution A = 56 % Percent transmittance of solution B = 33 % Percent…
Q: A ceric sulfate solution that was standardized using 200 mg of arsenic trioxide (MW 197.84g/n)…
A:
Q: A 18 g of unknown organic sample was dissolve in 756 mL of benzene. The boiling point of benzene was…
A: Given data is as follows: The mass of organic sample = 18 g The volume of benzene = 756 mL The…
Q: The standard addition method is used to analyze a sample of a river water for mercury. Solution A is…
A: Cold vapour atomic absorption spectroscopy or CVAAS is one of the primary techniques for mercury…
Q: If the equation produces from data is y = 0.343x - 1.021 and the absorbance for the unknown is…
A:
Q: Which data point in your standard curve is the most important in determining the best straight line…
A: Hello. Since you have asked multiple questions, I shall be answering the first question only. If you…
Q: A student weighed out 0.150 g of protein powder and dissolved it in 100 mL of water (Solution 1).…
A: In the solution, the solute concentration is decreased on the mixing of the more amount of the…
Q: If the equation produces from data is y = 0.343x - 1.021 and the absorbance for the unknown is…
A: Given data: Equation obtained from graph, y = 0.343x – 1.021 Absorbance (A) = 0.386
Q: The concentration of phenol in an aqueous solution is 10 ug/mL. The absorbance is found to be 0.209…
A:
Q: What is the concentralon (M) Of lCI in soln, made by niking 25.0mL Of a100 MKCI withc 50.0ml of a…
A: moles =Molarity(M) ×Volume(mL)1000 According to the question: The…
Q: 1. What is the MW of the analyte? 2. What is the meq of the analyte? 3. What will be the weight (in…
A: Since you have asked a question with multiple subparts we will answer the first three for you. To…
Q: A chemist received different mixtures for analysis with the statement that they contained NaOH,…
A: “Since you have posted a question with multiple sub-parts, we will solve the first three subparts…
Q: In this experiment, the mass of pure copper provided is 0.491 gram, and then it was dissolved in…
A: Given Mass of pure Copper is 0.491 g. Volume of original solution as 100 mL. Volume of diluted…
Q: 1. There is a substance in a solution (S.00 x1o M). when using a spectrophotometer, you find that…
A: According to Beer-Lambert's law, the concentration of a solution is directly related to the…
Q: How do I do question #3 about correspondence between % transmittance and absorbance? Thank you
A: The relation between absorbance (A) and Tansmittance (T) is :
Q: A ceric sulfate solution that was standardized using 200 mg of arsenic trioxide (MW = 197.84g/n)…
A:
Q: Anionic surfactants in wastewater are measured spectrophotometrically as methylene blue active…
A: Given: Limit of surfactant content in Philippine class B water is 300 ppb
Q: 5.00 mL of stock solution is diluted to 25.00 mL, producing solution ALPHA. 10.00 mL of solution…
A: Dilution factor refers to the ratio of initial volume of the concentrated solution to the final…
Q: Mass of aspirin used is .090 g the absorbance for the final solution was .304 nm Slope is 1708…
A: Given: Mass of aspirin used = 0.090 g The absorbance for the final solution was = 0.304 Slope is…
Q: ▪ A pharmaceutical analyst needs to do quality control of a sodium furosemide solution. The max for…
A: Absorbance = Absorptivity coefficient × Concentration × Path length Path length = 1 cm Absorptivity…
Q: A researcher prepared mixed solutions at different concentrations and measured the absorbances with…
A: Preparation of 1M H2SO4- Molecular wt Of H2SO4 98g/mol. For liquid solution, it's density has to be…
Q: Calculate the mass percent of the ascorbic acid in the same show full solution Situation: The…
A: A numerical problem based on acid-base titration that is to be accomplished.
Q: Two groups in a BIO 120 lab extracted a blue-violet pigment from mayana plant which was to be used…
A: According to Lambert Beer law, the absorbance (A) of a solution is directly proportional to…
Q: 0.025 M CH3COOH solution has a specific conductance of 2.33X10-4 Scm-1 , and molar conductivity at…
A: Molar Conductivity: Molar conductivity is conductivity of a solution that contains 1 mol of the…
Q: 3.) The following Beer's Law calibration plot was collected at 391.9 nm using the five mixtures…
A: We can use the given trend line equation for Absorbance versus chromate ion concentration graph and…
Q: calculate for molar absorptivity
A:
Q: statement is correct?
A: In Analytical Chemistry, an internal standard is defined as a chemical substance that is added to…
Q: A) Standard solution and Beer's law calibration curve 1-Fill in the following table : Concentration…
A:
Q: [Glucose), mg / mL | Absorbance 0.132 5.000 10.00 20.00 30.00 0.290 0.498 0.642 40.00 0.750 a. Using…
A: a) In the given table, the absorbance data of ferricyanide ion is given on varying the concentration…
Q: method as follows: punty of an ibuprofen sample was determined by a reversed phase HPLC Y A…
A: Equation for the best-fit line of the calibration curve is: y=26820x-1323.8
Q: Blue Blue dye stock solution 0.293 M Absorbance at 630 nm 0.00265 Calibration curve y = 0.0833x A…
A: a) The stock solution of blue dye has concentration = 0.293 M Since the volume of blue dye taken =…
Q: An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard…
A: Given absorbance of unknown diluted solution is 0.65
Q: A 60-year-old woman who weighs 75kg requires a loading dose of an antibiotic to treat an infection.…
A: The solution is given below -
Q: The homogeneity of the chloride level in a water sample from a lake was tested by analyzing por-…
A:
Q: Standard Solutions for FENCS2* Ion Beer-Lambert Plot mL of 2.00 x 101 M Fe(NO,)3 in 0.10 M HNO, mL…
A:
Q: An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard…
A: Given information:Absorbance (A) = 0.55A straight line with equation Abs = 4.850x + c
Trending now
This is a popular solution!
Step by step
Solved in 2 steps
- The table below describes a procedure in preparing standard solutions of a protein sample with different concentrations. (A) Determine the concentrations of each tube if the starting concentration of the protein is 500 mg mL (B) Determine the equation of the line if the concentration (x-axis) was plotted vs the absorbance (y-axis). (C) What is the concentration, in mg mL, of the diluted unknown protein sample if the absorbance at 595 nm is 0.333? L-1. Tube Volume of protein, Volume of water, Final concentration, Absorbance #3 mL mL (at 595 nm) mg mL-1 0.00 5.00 0.113 12 0.70 4.30 0.184 3 1.40 3.60 0.251 14 2.10 2.90 0.329 15 2.80 2.20 0.385 3.50 1.50 0.454 17 4.20 0.80 0.503 8 5.00 0.00 0.577 Suppose that the unknown protein (diluted) sample in 4.C was diluted from a protein stock solution. Determine the concentration of the original unknown protein stock solution if 2.00 mL of the protein solution was mixed with 8.00 mL of water to create the unknown protein (diluted) sample in 4.C.One of the CHEM3341 student Ms. Fatima Al Wahaibi wanted to analyse phosphate ion concentration in Fertilizer industry wastewater sample collected from Rusayl Industrial Estate using spectrophotometer method. She mixed 200.00 mL of wastewater sample which contains only Na;PO, (unknown molarity) with 400.00 mL of 0.0200 M K,PO4 in a one liter beaker to make a Solution A. She then transferred 25.00 mL of Solution A to a 250.00 mL volumetric flask and added distilled water up to the calibration mark to make up Solution B. The Concentration of phosphate ions in Solution B is known to contain 3.00 x 103 mol/L from the spectrophotometric analysis at 460 nm using 1 cm cuvette. Calculate the concentration of phosphate ion in wastewater and how many phosphate ions are present in this wastewater.An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard solutions is plotted vs. their concentration (molarity) and a straight line is obtained with the formula: Abs = 3.350x +0.08 An unknown food-dye soluton is diluted and it's absorbance is found to be 0.50. What is the molarity of the diluted unknown, to two significant figures?
- An unknown food-dye is analyzed by the method used in this experiment. The absorbance of 5 standard solutions is plotted vs. their concentration (molarity) and a straight line is obtained with the formula: Abs = 4.850x + 0 An unknown food-dye soluton is diluted and it's absorbance is found to be 0.55. What is the molarity of the diluted unknown?A water sample was analyzed for Fe content using the iron- phenanthroline method. The following data were obtained from the analysis: Reagent Blank Absorbance Absorbance (au) Reagent Blank Absorbance 0.003 Concentration of Stock Solution: 10 ppm Volume of Stock Solution (mL) Total Volume of Standard Solution Concentration of Standard Solution (ppm) Absorbance (au) (mL) 0.50 10.00 0.012 1.00 10.00 0.132 2.00 10.00 0.267 3.00 10.00 0.349 4.00 10.00 0.428 5.00 10.00 0.560 Volume of Unknown Solution Total Volume of Unknown Solution Trial Absorbance (au) (mL) (mL) 1 5.00 10.00 0.289 2 5.00 10.00 0.296 3 5.00 10.00 0.281 Determine the value of the slope (m), y-intercept (b), and the coefficient of determination (r²) A m = 0.1128; b = -4.0 x 10-5; r2 = 0.9880 B m = 0.1128; b = -4.0 x 10-5; r² = 0.9762 C) m = 0.1128; b = -3.0 x 10-³; r² = 0.9880 D m = 0.1128; b = -3.0 x 10-³; r² = 0.97621. Data & Results 4.0 mglmL Concentration of stock solution (include units): Table 1-Beer's Law Plot Data V Volume of standard solution dispensed (mL) M, Diluted concentration (include units) Sample Absorbance A 2.00 mL 0.084 4.00 mL 0.173 l6.00 mL 0.259 8.00 mL 0.340 E 10.00 mL 0.418 Equation of trendline from Beer's Law plot: whats the diluted concentration and equation of trendline from the beers law plot once created?
- I did an experiment: Molar concentration of Fe (NO3)3=.002 Molar concentration of NaSCN= .002 On my 1st trial: Volume of Fe(NO3)3 = 5 mL Moles of Fe3+, initial (mol) = 1 x 10-5 Volume of NaSCN (mL)= 1 mL Moles of SCN-,initial (mol)= 2 x 10-6 Absorbance was .08 Now trying to find Calculation of Kc I already found [FeNCS2+] equilibrium, from calibration curve (mol/L)= 2.25 x 10-5 Now I need to know: 1. moles FeNCS2+ at equilibrium (10mL) (mol) 2. moles Fe3+, reacted (mol) 3. moles Fe3+, equilibrium (mol) 4. [Fe3+] equilibrium, unreacted, 10 mL (mol/L) 5. moles SCN-, reacted (mol) 6. Moles SCN-, equilibrium (mol) 7. [SCN-] equilibrium (unreacted) 10 mL (mol/L) Feel free to just give me the formula to find these. Or to charge me 2 or 3 questions if I asked too much. Thank you!!!!!!Mass of Sample Volume of KMnO, solution used in titration Equivalents of permanganate used Equivalents of iron (II) in sample Moles of iron (II) in sample Grams of Iron in Sample % Iron in Sample Average % Iron in Unknown Instructor's Grade for Precision in Part B. Sample Calculations Part B: 0.58179 0.68719 28.19 ml 31,96m6 007662 00266 2 11 nA 22.41 mL of NaOH solution is required to reach the phenolphthalein endpoint in the standardization with 0.276 g of solid, monoprotic primary standard acid (MW 128.33) in a 25.00 mL solution. 12.34 mLof the same NaOH solution was added to titrate 5 mL of vinegar solution to the endpoint. Calculate the mass of acetic acid in this vinegar solution (d = 1.005 g/mL).
- A student performed a titration to determine the exact concentration of NaOH(aq). The titration was performed against a standard 0.1000 M HCl(aq) solution. Phenolphthalein indicator was used. The following end-point volumes were recorded by the student in units mL: Trial Number Volume 1 25.06 2 25.15 3 25.02 4 25.17 5 25.07 Calculate the 95% confidence limit. Assume that there is no outlier. Provide your answer to the correct number of decimal places, without units, and without the ± sign. Use the T-table shown below.Tonic water (20.0 mL) was added into each of two volumetric flasks (100 mL). The first flask was made up to volume with deionised water and produced an absorbance of 0.200. To the second flask was added an aliquot (20.0 mL) of a quinine standard solution (20.0 ppm) and after being made up to volume this produced an absorbance of 0.400. What is the concentration of quinine in the tonic water? a. 8.00 ppm b. 800 ppm С. 40.0 ppm d. 400 ppm е. 20.0 ppmThe Kjeldahl method was used to determine the nitrogen content of a protein. A 275 µL aliquot of a 47.0 mg/mL protein solution was digested in boiling sulfuric acid. The solution was made basic and the liberated NH, was collected in 5.00 mL of 0.0512 M HCl. A volume of 7.00 mL of 0.0174 M NaOH was required to react with the excess HCl. Calculate the weight percent of nitrogen in the protein. weight percent: wt% N