STANDARD SOLUTION IS PREPARED WITH Co AND Ti WITH
cO :Ti :: 1.00 : 1.78
THEN Ti / cO is 1.78
AND THE CONCENTRATIONS USED ARE
Ti IS 1.32 µg/ml AND Co IS 1.54 µg/ml.
IN THE PRESENT EXPERIMENT, 3.5/ml IS MIXED WITH 5.00 ml OF UNKNOWN CONCENTRATION OFTi.
THE CONCENTRATION OF THE GIVEN Ti IN UNKNOWN SOLUTION IS
Ti IS 1.78 * 1.149 / 0.202 = 10.12
THE FORMUALA CAN BE ARRIVED BY CALCULATING 5.00 * 10.12 / 3.50 = 14.57
HENCE HE CONCENTRATION OF i IS 14.57 * 0.149 / 0.202 = 10.74 µg / ml
µ
Co(II) was used as an internal standard to analyze a sample of Ti(IV) with atomic absorption...
Co(ll) was used as an internal standard to analyze a sample of Ti(IV) with atomic absorption spectroscopy (AAS). A standard mixture containing 1.90 g Co/mL and 1.53 /g Ti/mL measured by AAS produced a signal-to-signal ratio of 2.04 Ti: 1.00 Co A mixture was prepared by combining 4.50 mL of a Ti(IV) solution of unknown concentration with 3.50 mL of a 14.4 ug/mL solution of Co(l1). The absorbance of the mixture at the Ti(IV) wavelength was 0.100 and the absorbance...
Mn was used as an internal standard for measuring Fe by atomic absorption. A standard mixture containing 2.00 Hg/mL Mn and 2.50 Hg/mL Fe gave a quotient (Fe signal/Mn signal) 1.05/1.00. A solution was prepared by mixing 10.00 mL of unknown Fe solution with 10.00 mL of standard containing 8.24 ug/mL Mn, and diluting to 50.00 mL; the measured absorbance signal at the Fe wavelength was 0.197, and at the Mn wavelength the absorbance was 0.116. Calculate the molar concentration...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 μL of a 1000.0 μg/mL Cd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Absorbance Reagent blank 0.023 Sample 0.498 Sample plus addition 0.714 What is the concentration of the cadmium in the waste stream sample?
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 μL of a 1000.0 μg/mL Cd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Absorbance Reagent blank 0.024 Sample 0.395 Sample plus addition 0.859 What is the concentration of the cadmium in the waste stream sample? c= μg/mL Later, the analyst...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 ug/mL Cd standard was added to 10.0 mL of solution. The following data were obtained Absorbance of reagent blank 0.042 Absorbance of sample 0.377 Absorbance of sample plus addition 0.762 What was the concentration of the cadmium in the waste stream sample? Number 0.4 ug mL Later,...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.010.0 μL of a 1000.0 μg/mL CdCd standard was added to 10.0 mL of the unknown solution. The results obtained are shown in the table. Reagent blank 0.023 Sample 0.342 Sample plus addition 0.749 What is the concentration of the cadmium in the waste stream sample? Later, the analyst learned that the...
Atomic emission spectroscopy and the method of standard addition are used to determine the Nat concentration and its uncertainty in an unknown sample. Increasing amounts of a 1.75 μg/m standard Na+ solution are added to a series of volumetric flasks containing 15.00 mL of the unknown 200.0 mL. Atomic emission spectroscopy is then used to measure the emission intensity of each solution. solution. The volumetric flasks are then diluted to a final volume of Unknown volume Standard volume Final volume...
Atomic absorption spectroscopy was used with the method of standard additions to determine the concentration of cadmium in a sample of an industrial waste stream. For the addition, 10.0 L of a 1000.0 mL Cd standard was added to 10.0 mL of solution. The following data were obtained: sorbance of reagent blank- 0.029 Absorbance of sample 0.464 Absorbance of sample plus addition 0.863 What was the concentration of the cadmium in the waste stream sample? Number 1.09x 10 ug/mL Later,...
3. Suppose that an unknown sample is analyzed
spectrophotometrically at the same wavelength that was used for the
standard curve and the absorbance was found to be 0.196. Use the
standard curve to find the concentration of the unknown.
1. Calculate the concentration of a solution prepared by adding 15.00 mL of 1.98 x 10-3 M KMnO, from a buret into a 50.00 mL volumetric flask, which is then filled to the 50.00 mL graduation mark with distilled water. Hint:...
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