Question 1
from 100 mg of K2Cr2O7 dissolved in 1 L of Deionized water is diluted up to 1 mL using the micropipette and a volumetric flask. The formula mass and molar absorptivity of K2Cr2O7 is 294.2 and 4766 respectively. If the absorbance reading of the diluted solution reads 0.320 in a spectrophotometer with a 10mm light path, then calculate the percent error of the micropipette. Show all calculations.
Question 2
A spectrophotometric check is performed on a 200uL micropipette: 200uL of a solution ?
Question 3
In a total protein analysis where the color follows Beerâs Law, a patientâs serum had an absorbance of 0.300 at 540nm; a 5.0 g/L standard had an absorbance of 0.250 at 540 nm, the patientâs protein concentration is:
Question 4
A sodium concentration is reported as 326 mg/dL. The concentration expressed in mEq/L is: (atomic weight Na is 23):
Question 1
from 100 mg of K2Cr2O7 dissolved in 1 L of Deionized water is diluted up to 1 mL using the micropipette and a volumetric flask. The formula mass and molar absorptivity of K2Cr2O7 is 294.2 and 4766 respectively. If the absorbance reading of the diluted solution reads 0.320 in a spectrophotometer with a 10mm light path, then calculate the percent error of the micropipette. Show all calculations.
Question 2
A spectrophotometric check is performed on a 200uL micropipette: 200uL of a solution ?
Question 3
In a total protein analysis where the color follows Beerâs Law, a patientâs serum had an absorbance of 0.300 at 540nm; a 5.0 g/L standard had an absorbance of 0.250 at 540 nm, the patientâs protein concentration is:
Question 4
A sodium concentration is reported as 326 mg/dL. The concentration expressed in mEq/L is: (atomic weight Na is 23):
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