PRINCIPLES OF INSTRUMENTAL ANALYSIS
7th Edition
ISBN: 9789353506193
Author: Skoog
Publisher: CENGAGE L
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Chapter 17, Problem 17.9QAP
Interpretation Introduction
Interpretation:
The equation of the calibration curve should be determined and the concentration of the three unknown samples should be determined.
Concept introduction:
A calibration curve or standard curve is a method used in
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Students have asked these similar questions
A student wanted to determine the level of lead in amoxicillin powder, so he
transferred 148 mg of the powder to 200 ml volumetric flask and completed
the volume volumetrically, then he transferred 5 ml of the obtained solution to
50 ml volumetric flask and completed the volume properly, and read the
absorbance of the obtained solution on AAS. The reading was 0.48. and the
calibration equation was: "Y =12.25 x- 0.05" (concentration microg./mL).
?"Calculate the content of lead in amoxicillin as "ppm
326.5.a O
605.0 .b O
60.5.c O
17.5.d O
584.7.e O
أخل اختياري
A student wanted to
determine the level of lead in
amoxicillin powder, so he
transferred 148 mg of the
powder to 200 ml volumetric
flask and completed the
volume volumetrically, then
he transferred 5 ml of the
obtained solution to 50 ml
volumetric flask and
completed the volume
properly, and read the
absorbance of the obtained
solution on AAS. The reading
was 0.48. and the calibration
equation was: "Y =12.25 x-
0.05" (concentration
microg./mL). Calculate the
content of lead in amoxicillin
as "ppm"?
O a. 326.5
O b. 605.0
6.
Blue
Blue dye stock solution
0.293 M
Absorbance at 630 nm
0.00265
Calibration curve
y = 0.0833x
A solution is prepared by diluting 2.79 mL of the blue dye stock solution to 25.00 mL. The measured
absorbance for the prepared solution is listed in the data table.
(a) What is the theoretical molar concentration?
[Blue]theoretical
x 10
|M
(b) What is the experimental molar concentration?
[Blue]experimental
x 10
M
(c) What is the percent error?
Percent error (blue) =
%
Chapter 17 Solutions
PRINCIPLES OF INSTRUMENTAL ANALYSIS
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