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The molar absorptivity of crystal violet can be determined using Beer's Law. Beer's Law is A=E*c*l where A is absorbance, E is the molar absorptivity, C is the concentration of the crystal violet, and l is the path length. Path length is how long the light has to travel through the solution. If you can find the absorbance of a certain concentration by using a spectrophotometer, where the path length is 1 cm, then you know all the variables and are able to solve for the molar absorptivity.
For example, the measured absorbance of 2.5x10^-5 M CV (crystal violet) is 1.64 with a path length of 1 cm. This means
1.64=E*(2.5x10^-5)*1
E=1.64/(2.5x10^-5)
E=65600
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What is the extinction coefficient of crystal violet?
The extinction coefficient of crystal violet is approximately 89,000 M^(-1)cm^(-1) at a wavelength of 590 nm. This value indicates the molar absorptivity of crystal violet at this specific wavelength, which is commonly used for measuring the concentration of crystal violet in solution using spectrophotometry.
What is the molar absorptivity of red dye?
The molar absorptivity of a substance is a measure of how strongly it absorbs light at a particular wavelength. To determine the molar absorptivity of red dye, you would need to know the specific type of red dye as well as the wavelength of light at which its absorption is being measured. Molar absorptivity is typically provided in literature or can be experimentally determined.
What is the molar absorptivity of CuSO4 and how does it impact the measurement of its concentration in a solution?
The molar absorptivity of CuSO4 is a measure of how well it absorbs light at a specific wavelength. It impacts the measurement of its concentration in a solution by affecting the amount of light absorbed, which is used to determine the concentration through a calibration curve. A higher molar absorptivity means more light is absorbed, leading to a more accurate concentration measurement.
What is the molar absorptivity of copper and how does it impact the analysis of copper-containing compounds?
The molar absorptivity of copper is a measure of how well copper absorbs light at a specific wavelength. It impacts the analysis of copper-containing compounds by helping to determine the concentration of copper in a sample based on the amount of light absorbed. A higher molar absorptivity means that copper can be detected at lower concentrations, making the analysis more sensitive and accurate.
What is the extinction coefficient (aka molar absorptivity) for CuSO4 at the wavelength you used?
The extinction coefficient, also known as molar absorptivity, for CuSO4 at the specific wavelength used is a measure of how strongly the compound absorbs light at that wavelength. It is a constant value that helps determine the concentration of the compound in a solution based on its absorbance.
What is the extinction coefficient of crystal violet?
The extinction coefficient of crystal violet is approximately 89,000 M^(-1)cm^(-1) at a wavelength of 590 nm. This value indicates the molar absorptivity of crystal violet at this specific wavelength, which is commonly used for measuring the concentration of crystal violet in solution using spectrophotometry.
What is the molar absorptivity of red dye?
The molar absorptivity of a substance is a measure of how strongly it absorbs light at a particular wavelength. To determine the molar absorptivity of red dye, you would need to know the specific type of red dye as well as the wavelength of light at which its absorption is being measured. Molar absorptivity is typically provided in literature or can be experimentally determined.
Why can you not measure the molar absorptivity of the food dyes?
You can.
How does the molar absorptivity depend upon the concentration mole per L of the dissolved solute?
Molar absorptivity is completely independent of concentration of a substance as Molar absorptivity is represented by epsilon and is a constant. Absorbance of light is what is dependent upon concentration and will go down as concentration goes down and increase as concentration increases.
What is the molar absorptivity of CuSO4 and how does it impact the measurement of its concentration in a solution?
The molar absorptivity of CuSO4 is a measure of how well it absorbs light at a specific wavelength. It impacts the measurement of its concentration in a solution by affecting the amount of light absorbed, which is used to determine the concentration through a calibration curve. A higher molar absorptivity means more light is absorbed, leading to a more accurate concentration measurement.
What is the molar absorptivity of copper and how does it impact the analysis of copper-containing compounds?
The molar absorptivity of copper is a measure of how well copper absorbs light at a specific wavelength. It impacts the analysis of copper-containing compounds by helping to determine the concentration of copper in a sample based on the amount of light absorbed. A higher molar absorptivity means that copper can be detected at lower concentrations, making the analysis more sensitive and accurate.
What is the molar absorptivity of Cu2 plus at 620 nm given that the cuvettes used in lab had a pathlength of 1.00 cm with a concentration verse absorbtivity curve of y equals .727x plus .0557?
The molar absorptivity of Cu2+ at 620 nm can be calculated using Beer-Lambert law equation A = εlc, where A is the absorbance, ε is the molar absorptivity, l is the pathlength (1.00 cm), and c is the concentration. Using the concentration- absorbance curve given (y = 0.727x + 0.0557), at 620 nm, x = c = 1. Therefore, substituting these values into the Beer-Lambert equation will give you the molar absorptivity of Cu2+ at 620 nm.
What is the charge of crystal violet?
The charge of crystal violet is positive.
What is the extinction coefficient (aka molar absorptivity) for CuSO4 at the wavelength you used?
The extinction coefficient, also known as molar absorptivity, for CuSO4 at the specific wavelength used is a measure of how strongly the compound absorbs light at that wavelength. It is a constant value that helps determine the concentration of the compound in a solution based on its absorbance.
What is the extinction coefficient (aka molar absorptivity) of CuSO4 at the wavelength you used?
The extinction coefficient, also known as molar absorptivity, of CuSO4 at the specific wavelength used is a measure of how strongly the compound absorbs light at that wavelength. It is a constant value that helps determine the concentration of the compound in a solution based on its absorbance.
Is the crystal violet test result positive or negative?
The crystal violet test result is positive.
Why is hydrochloric acid added in a molar absorptivity of benzoic acid?
Hydrochloric acid is added to benzoic acid to convert it into its water-soluble salt form, sodium benzoate. This transformation allows for the benzoate ions to be detected and measured accurately in spectrophotometric analysis, which helps determine the molar absorptivity of benzoic acid.
