urses/29512. A linear standard curve of KMnO4 is prepared from a set of standard solutions by plottingabsorbance (y) vs. concentration (x). Use Logger Pro (as described in the Data Analysis for thisexperiment), or Google Sheets/Excel, to plot this standard curve using the data in Table 1. Help withspreadsheets [PDF]Table 1: Data for the standard curve of KMnO4Absorbance Concentration (M)0.3726.00 x 10-40.2980.2230.1490.0744After plotting the standard curve, enter its slope below (not the equation of the line). Report youranswer to 3 significant figures. If your answer ends in one or more zeros, use scientific notation.Slope =4.80 x 10-43.60 x 10-42.40 x 10-41.20 x 10-4M-1M3. Suppose that an unknown sample is analyzed spectrophotometrically at the same wavelength thatwas used for the standard curve and the absorbance was found to be 0.186. Use the standard curveto find the concentration of the unknown. Hint:

The objective of this question is to determine the slope of the standard curve of KMnO4 and use it…

Answered: urses/ 2951 2. A linear standard curve…

Fundamentals Of Analytical Chemistry

9th Edition

ISBN:9781285640686

Author:Skoog

Publisher:Skoog

Chapter8: Sampling, Standardization, And Calibration

Section: Chapter Questions

Problem 8.14QAP

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A 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).
grammarly-G X * Content oard.odu.edu/ultra/courses/_393452_1/cl/outline F2 Question Completion Status: X GA student wan X 1 QUESTION 3 A student wants to determine the solubility of water and copper (1) bromide (a green solid) in ethyl acetate (a colorless organic liquid). She places 1 mL of ethyl acetate into each of two test tubes. To one, she adds 5 drops of water to it. To the other, she adds a small scoop of copper(1) bromide. 8.0 F3 2 - Which test tube represents the ethyl acetate and A. Test tube 1 copper(1) bromide if the copper(1) bromide is insoluble in ethyl B. Test tube 2 acetate? C. Test tube 3 D. Test tube 4 - Which test tube represents the mixture of the ethyl acetate and water if the water is insoluble in ethyl acetate? $ Question Com X C Chegg Search x 3 Which test tube represents the mixture of the ethyl acetate and water if the water is soluble in ethyl acetate? - Which test tube represents the ethyl acetate and copper(1) bromide if the copper(1) bromide is soluble…
Calculate the values for log Kow and the saturated aqueous solubility (Cw$sat) for bisphenol A. The value for log Kow is 3.62 ; enter your answer as X.XX The value for Cwsat is ; report your answer in units of moles/liter and enter it as X.XX×10(-X). Bisphenol A is closest to "phthalates" H3C CH3 HO HO,
9. An aqueous solution of sulfuric acid is prepared by mixing a secondary standard of sulfuric acid with deionized water. The aforementioned acid is to be used as a titrant hence its concentration must be accurately determined. To do this, Engr. Polinar, standardized the titrant by titrating two liters of ammonia at 0.90 atm and 30 deg C. From the experiment, 134 mL of the titrant was necessary to neutralize the ammonia. Determine the concentration of the acid in terms of normality? 10. Engr. Forcadela is optimizing a plastic formulation by manipulating the phosgene concentration injected as a gas during the reaction. To obtain credible results, he considered the propensity of phosgene to dissociate into carbon monoxide and chlorine gas at 395 deg C. Performing an experiment at the aforementioned temperature, an equilibrium is reached amongst the species where the total pressure is at 3 atm. If the equilibrium constant expression in terms of concentration for the reaction at 395 deg C…
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The following data give the constant dissociation, K (for acetic acid at various temperatures) T("C) 0 10 15 25 K₂ 1.657 x 10 1.729 x 10 1.745 x 10-5 1.753 x 10 Part A Using the information that InK versus 1/T is a straight line with slope-AH/R. calculate AH for the lonization of acetic acid Express your answer with the appropriate units. AH 2.732 HA kJ mol Submit Previous Answers Request Answer Part B Complete previous panis) ? X Incorrect; Try Again; 4 attempts remaining Review | Constants I Periodic Table
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A solution of HCl was titrated against sodium carbonate. What is the average normality of acid in the given data? (MW Na₂CO3 = 106) T2 0.3479 0.3562 0.3042 Weight (g) Initial V (ml) 0.80 1.60 35.20 36.70 39.80 Final V (mL) Vol HCl used (mL) 35.10 39.40 N of HCl (eq/L) 0.1954 0.1870 Average N of HCl (eq/L)
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Molarity of Na2S2O3 (stock solution). 0.100 M Volume of diluted bleach titrated (taken from the volumetric flask). 10ml Initial Burette Reading. 14.80 Final Burette Reading 25.60 Volume of Na2S2O3 used in the titration (mL). 10.80 Moles of Na2S2O3 used in the titration. 1.71 Moles of S2O3–2 used. 1.66 Moles of I2 initially present in titration mixture 0.83 Moles of NaOCl in the diluted bleach titrated. 0.415 Moles of OCl– in the diluted bleach titrated. ?

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