A solution of potassium permanganate of unknown concentration was analyzed against a standard of various concentrations. Refer to the following data set to answer the succeeding questions (MM KMnO4 = 158.034 g/mol). Table 1. Data for Standard Calibration Curve KMnO4 Standard (grams/Liter) Absorbance at 525 nm 0.008 0.10437 0.158 0.20197 0.316 0.45288 0.474 0.68232 0.632 0.89361 Table 2. Data for KMnO4 Solution of Unknown Conc. Sample of Unknown Conc. Absorbance at 525 nm Undiluted KMnO4 0.95423 Diluted KMnO4 (50% dilution) 0.46514 Which of the following linear equation for the standard calibration curve is generated fromTable 1? y= 0.03231x – 0.74923 y= 0.04848x + 1.3179 y= 1.3179x + 0.04845 y= 0.74923x – 0.03231

A solution of potassium permanganate of unknown concentration was analyzed against a standard of various concentrations. Refer to the following data set to answer the succeeding questions (MM KMnO4 = 158.034 g/mol). Table 1. Data for Standard Calibration Curve KMnO4 Standard (grams/Liter) Absorbance at 525 nm 0.008 0.10437 0.158 0.20197 0.316 0.45288 0.474 0.68232 0.632 0.89361 Table 2. Data for KMnO4 Solution of Unknown Conc. Sample of Unknown Conc. Absorbance at 525 nm Undiluted KMnO4 0.95423 Diluted KMnO4 (50% dilution) 0.46514 Which of the following linear equation for the standard calibration curve is generated fromTable 1? y= 0.03231x – 0.74923 y= 0.04848x + 1.3179 y= 1.3179x + 0.04845 y= 0.74923x – 0.03231

Chemistry & Chemical Reactivity

10th Edition

ISBN:9781337399074

Author:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Publisher:John C. Kotz, Paul M. Treichel, John Townsend, David Treichel

Chapter4: Stoichiometry: Quantitative Information About Chemical Reactions

Section4.9: Spectrophotometry

Problem 4.14CYU

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A solution of potassium permanganate of unknown concentration was analyzed against a standard of various concentrations. Refer to the following data set to answer the succeeding questions (MM KMNO4 = 158.034 g/mol). Table 1. Data for Standard Calibration Curve KMN04 Standard Absorbance at 525 nm (grams/Liter) 0.008 0.10437 0.158 0.20197 0.316 0.45288 0.474 0.68232 0.632 0.89361 Table 2. Data for KMNO4 Solution of Unknown Conc. Sample of Unknown Absorbance at 525 nm Conc. Undiluted 0.95423 KMN04 Diluted KMNO4 0.46514 (50% dilution) Which of the following linear equation for the standard calibration curve is generated from Table 1? y= 0.74923x – 0.03231 y= 0.03231x –0.74923 y= 1.3179x + 0.04845 y= 0.04848x + 1.3179 O O O
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