While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined. Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

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Answer 1

Question

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

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Students have asked these similar questions

1. Why does a deuterium lamp produce a continuum rather than a line spectrum in the UV?

Which of the following is not a step in Atomic Absorption Spectroscopy (AAS)? A. Atoms absorb light. B. A solution is vaporized C. A calibration curve is constructed. D. Particles are adsorbed onto a stationary phase.

Why must solutions with high concentrations be diluted prior to analysis via Beer's Law? A. The relationship between absorbance and concentration is not linear at high concentrations. B. The detector will reach its detection threshold. C. The photon source is too weak to provide accurate results. D. There is no need to work with dilute concentrations; any concentrations will work. E. The molar absorptivity of a compound is dependent on its concentration.

Answer 2

Question

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

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Answer 3

Question

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

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Answer 4

Question

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

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Answer 5

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

Answer 6

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

Answer 7

Chapter 8.4, Problem 4E

(a)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the error in mg/L, in the mass of sample present in solutions needs to be determined.

Concept Introduction: The spectroscopy that uses light in the visible and adjacent range, giving absorption spectroscopy or reflectance spectroscopy, is termed as UV-Vis or Ultraviolet-Visible Spectroscopy.

Answer 8

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

Answer 9

(b) (i)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, and assuming that a maximum was observed at a wavelength of 278 nm for this solution and that the value of A at this maximum was 0.623 when a 1-cm cell was used, and molar mass of 100 for ε , the value of ε needs to be calculated.

Concept Introduction: Depending on the chemical composition and structure of a chemical substance, light with a particular wave length is being absorbed by them, and a measure of such absorption of light, defining its strength is known by the term Molar Extinction Coefficient ( ε )

Answer 10

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

Answer 11

(b) (ii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the information regarding the maximum value needs to be expressed.

Concept Introduction : When the value of molar extinction coefficient is known the value of log ε could be determined.

Answer 12

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

Answer 13

(b) (iii)

Interpretation Introduction

Interpretation: While preparing a sample of UV-Vis analysis, if one assumes that the concentration of c, in methanol was 0.00600 g/L (True Value), against the actual value (Calculated Value) of 0.00576 g/L, the % error in ε associated with the inaccuracy in assuming the actual concentration of the solution needs to be determined.

Concept Introduction: Molar concentration c can be derived by dividing the concentration of methanol by its molar mass

Answer 14

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Answer 15

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Answer 16

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Answer 17

Ch. 8.2 - Prob. 1E Ch. 8.2 - Prob. 2E Ch. 8.2 - Prob. 3E Ch. 8.2 - Prob. 4E Ch. 8.2 - Prob. 5E Ch. 8.2 - Prob. 6E Ch. 8.2 - Prob. 7E Ch. 8.2 - Prob. 8E Ch. 8.2 - Prob. 9E Ch. 8.2 - Prob. 10E

Solution Summary: The author explains that the difference between the calculated value and the true value is defined as Error.

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