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thymol blue
436, 545 and 595 nm
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∙ 11y ago
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Why do value of absorbance have no units?
Because it's a relative value.
Why are the absorbance values obtained from the conversion chart rather than the absorbance scale on the spectronic 20?
because that chart gives a more accurate value than the absorbance scale on the specthometor
What is e-value of a optical brightening agent?
e-value of an optical brightening agent is the absorbance value obtained (in the UV region), when the absorbance of 1% solution is measured using a cuvette of 1 cm path length. T.J.R.PILLAI
What is the absorbance value for tartrazine?
427nm plus or minus 3 nm.
Is thymol mercury?
No. You are thinking of thimerosal. Thymol is in thyme and oregano oils.
Why do value of absorbance have no units?
Because it's a relative value.
What has the author John Rupert Merritt written?
John Rupert Merritt has written: 'Some thymol derivatives of possible medicinal value' -- subject(s): Thymol
Why are the absorbance values obtained from the conversion chart rather than the absorbance scale on the spectronic 20?
because that chart gives a more accurate value than the absorbance scale on the specthometor
What is e-value of a optical brightening agent?
e-value of an optical brightening agent is the absorbance value obtained (in the UV region), when the absorbance of 1% solution is measured using a cuvette of 1 cm path length. T.J.R.PILLAI
What is the absorbance value for tartrazine?
427nm plus or minus 3 nm.
Why the value of absorbance is always between the 0-2?
It's over 9000.
Is thymol mercury?
No. You are thinking of thimerosal. Thymol is in thyme and oregano oils.
True or false As the concentration of a colored solution increases the absorbance value decreases?
Absorbance rises with concentration because there is more material for a given frequency of light to be absorbed in. Your statement is false.
Why should an absorbance level not exceed a value of 1?
An absorbance value exceeding 1 can indicate that the sample is too concentrated, leading to inaccuracies in the measurement due to light scattering or saturation of the detector. To ensure accurate readings and avoid errors, it is recommended to dilute the sample to bring the absorbance within the linear range of the detector.
Is wavelength or absorbance the dependent variable?
"absorbance"Since in the experiment, you probably choose the wavelength, then measure the absorbance (absorption?, the absorbance is the dependent variable.
What is the purpose of the blank?
Blank Sample in Spectrophotometry is used to measure the absorbance of light without sample. It is subtracted from the total absorbance for measurement of Absorbance from a sample's absorbance.
Why is thymol blue used as the indicator for titration of acetic acid and naoh?
An indicator that changes its colour around pH value 5 should be used in this titration. Alternatively, instead of Thymol Blue, Methyl Orange or Methyl Red may be used.
