For a certain analysis, the concentration of the analyte was determined using the model equation: Saample-Splank k CA= where CA is the analyte concentration, Searmple is the signal given by the sample, Seiank is the signal given by the blank (sample with no analyte) andk is a proportionality constant. Which of the following formulas best describes the calculation for the combined uncertainty in CA?

For a certain analysis, the concentration of the analyte was determined using the model equation: Saample-Splank k CA= where CA is the analyte concentration, Searmple is the signal given by the sample, Seiank is the signal given by the blank (sample with no analyte) andk is a proportionality constant. Which of the following formulas best describes the calculation for the combined uncertainty in CA?

Chemistry

10th Edition

ISBN:9781305957404

Author:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Publisher:Steven S. Zumdahl, Susan A. Zumdahl, Donald J. DeCoste

Chapter1: Chemical Foundations

Section: Chapter Questions

Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...

See similar textbooks

Similar questions

Ben ran through the experiment and found the best-fit line listed below for his standard calibration curve of absorbance vs concentration in M. y = 3214.0x + 0.0076 Ben then prepared a solution that had 5.00 mL 0.002 M iron(III) nitrate in 1 M nitric acid, 3.00 mL 0.002 M potassium thiocyanate, and 2.00 mL DI water. If the absorbance for the solution was 0.436, calculate the equilibrium concentration of iron(III) thiocyanate in the solution. Report your answer in mM with three places after the decimal.
2. Estimate the absolute deviation and the coefficient of variation for the results of the following calculations. Round each result so that it contains only significant digits. The numbers in parentheses are absolute standard deviations. 2 (1.203 (+0.004) x 103 + 18.25 (10.005) x 102 – 34.012(±0.001)) 3.9201 (+0.0006) x 10-3 y =
An ore sample was analyzed for its Fe content. Student A analyzed the sample a total of six times and her results had a standard deviation of 1.33. The same sample was analyzed five times by Student B and his results had a standard deviation of 3.42. To determine if their standard deviations are similar, they perform an F test. The calculated F value is and the table value of Fis 3 in your book for critical values of F. O 6.61; 7.39 O 6.61; 9.36 O 0.151; 9.36 O 2.57; 7.39 O 6.61; 6.98 Refer to Table 4-
If an uncalibrated 5 (±0.03) mL pipet is used to deliver a total of 15 mL, what is the uncertainty delivered in the 15 mL?
A calibrated pipet delivers a mean volume of 24.991 mL with a standard uncertainty of ± 0.006 mL. What is the uncertainty if you deliver four aliquots to reach 100 mL?
Home Insert Draw View A Text Mode Lasso Select Insert Space + 4. When measuring the volume of a liquid, how would sample size (e.g., using a 10 mL graduated cylinder vs. a 100 mL graduated cylinder to measure out 70 mL of a liquid) affect the absolute error and percentage error in the measured values of mass and volume and therefore the density?
Calculate the absolute uncertainty for the following: (1.15 ±0.24 ng)/(2.20 ±0.35 L)
1) Report the results of this calculation along with both the percent relative and absolute uncertainties. 417.3 ± 0.4 × 71.8 ± 0.7(647.21 ± 0.2 − 182.3 ± 0.4) Absolute uncertainty:Percent uncertainty:
What is the level of uncertainty in the measurement 0.00035 mg?
1,3,5 what the correct answer?
Dr. Caras was characterizing a cytochrome (an iron containing protein) from a new strain of bacteria. He obtained eight measurements of the percent iron in the protein: 0.2409%, 0.2404%, 0.2394%, 0.2399%, 0.2515%, 0.2393%, 0.2409%, and 0.2392%. Calculate the mean (x) and standard deviation (s) for these results. % S = Use the Grubbs test to determine if one of these values is an outlier. What is the value of Galculated? Gcalculated = Should this potential outlier be rejected with 95% confidence? Critical values of G can be found in this table. The potential outlier should be rejected. The potential outlier should be kept.