4. (review: multi-point standard addition method) Calcium is determined in river water sample using flame AAS. Four 25.00ml aliquots of river water are delivered into four 50mL volumetric flasks, to each flask aliquots of 2.50ppm standard are added in the amounts of 0, 1.00, 2.00 and 3.00mL, followed by dilution to volume. Absorbance of each solution is measured, giving signals of 0.101, 0.176, 0.238, and 0.310, respectively. Report the concertation of calcium in your sample with its uncertainty and correct significant figures.

4. (review: multi-point standard addition method) Calcium is determined in river water sample using flame AAS. Four 25.00ml aliquots of river water are delivered into four 50mL volumetric flasks, to each flask aliquots of 2.50ppm standard are added in the amounts of 0, 1.00, 2.00 and 3.00mL, followed by dilution to volume. Absorbance of each solution is measured, giving signals of 0.101, 0.176, 0.238, and 0.310, respectively. Report the concertation of calcium in your sample with its uncertainty and correct significant figures.

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

What are the steps to yield Only typed solution
(9.29 × 105/8)-20.81 = with correct sig figs
A supporting electrolyte is usually added to the analyte solution to minimize solution resistance.minimize solution conductivity.make the analyte less soluble in solution.increase the scan rate.
Which among the options for minimzing errors (Separation, Saturation-Mix Modification-Masking, Dilution and Matrix Matching, Internal Standard Methods, Standard Addition Methods) is most helpful with more advantages than disadvantages?
31 and 32. pls help and show solution plsss
Nitrogen Content Assay Method I is also known as? Distillation Micrometric Method Macromethod Semimicro Method
Very pure silver nitrate standard reagent requires standardization with primary standard NaCl or KCl True False A water sample was analyzed for the total hardness through the reaction between the sample and EDTA. The data obtained from the experiment are presented below (MM CaCO3 = 100.0869 g/mol): Table 1. Standrdization of the EDTA solution mass of CaCO3 used 0.5467 g Initial burette reading 8.25 mL Final burette reading 16.65 mL Volume consumed 8.40 mL Table 2. Determination of Hardness of Water Volume of water sample 25.00 mL Initial burette reading 15.00 mL Final burette reading 24.00 mL Volume consumed 9.00 mL 23,469 ppm 22,456 ppm 21,290 ppm 23,990 ppm
Which of the following is not a feature that primary standard substances should have.A. must be of high purityB. must be of low molecular weightC. must be stable in airD. must dissolve sufficiently in titration medium
Please stop rejecting this... its not graded it’s for me and my own use to study
Give an observation and inference hexane is subjected into lucas test and Metallic sodium test
1. Define sparging. What is the significance of this step in an HPLC analysis? 2. What are the two types of pre-column? What is the purpose of each type? 3. What are the two types of packing used in HPLC column? Describe each type. Please answer numbers 1-3. Need asap
Give both solution just with small explanation Asap Thanks