EXERCISE ON EXTERNAL AND INTERNAL STANDARD METHODS Potassium can be determined by spectrometry using a lithium internal standard. The following data were obtained for standard solutions of KCI and an unknown containing a constant, known amount of LICI as the internal standard. Concentration (ppm) 1.0 Intensity of Kemission Intensity of Li emission 10.0 10.0 2.0 15.3 7.5 5.0 34.7 6.8 7.5 65.2 8.5 10.0 95.8 10.0 20.0 110.2 5.8 Unknown sample 47.3 9.1 Using the external standard method: a. Plot the Kemission intensity vs. the concentration of K, and determine the equation of the line, slope and y-intercept. un co n

EXERCISE ON EXTERNAL AND INTERNAL STANDARD METHODS Potassium can be determined by spectrometry using a lithium internal standard. The following data were obtained for standard solutions of KCI and an unknown containing a constant, known amount of LICI as the internal standard. Concentration (ppm) 1.0 Intensity of Kemission Intensity of Li emission 10.0 10.0 2.0 15.3 7.5 5.0 34.7 6.8 7.5 65.2 8.5 10.0 95.8 10.0 20.0 110.2 5.8 Unknown sample 47.3 9.1 Using the external standard method: a. Plot the Kemission intensity vs. the concentration of K, and determine the equation of the line, slope and y-intercept. un co n

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

Calculate the the activity of Chloride ion in a solution containing 0.013 M MgCl₂ and 0.033 M Na₂SO4 Answer:
please answer what you can. thank you so much in advance. :) Standardisation of EDTA using zinc metal Mass of zinc = 1.050 g. Calculate the number of moles of EDTA in the average titre (show workings) Calculate the concentration of the EDTA solution (show workings) Calculate the concentration of the DILUTED EDTA solution (show workings) Sample No. 1 2 3 4 Final Burette reading (mL) 20.25 42.75 22.90 44.50 Initial Burette reading (mL) 0.05 20.25 1.50 22.90 Final-Initial Titre (mL) 20.20 22.50 21.4
Show work
The following data were obtained when a Ca²+ ion-selective electrode was immersed in a series of standard solutions. (Note: for this question you may assume the activity coefficient of Ca is unity and concentration equals activity) [Ca²+] (M) 3.38E-5 3.38E-4 3.38E-3 3.38E-2 3.38E-1 E (mv) This data produced the following calibration curve. 60 40 20 0 -40 -60 -80 -100 E (mV) -74.8 -46.4 -18.7 in 10.0 37.7 y = 28.14x + 51.096 log10[Ca2+] -1 0 Calculate the concentration of calcium in a sample that gave a reading of -72.8 mV. Answer using scientific notation with 3 significant digits (e.g. 3.14E-4). Be sure to include units in your answer.
Calculate the molar solubility of Zn(OH)2 in a solution of 0.0167 M K₂SO4.
I P E Question 9 A second calibration standard solution of an iron(III) salicylate complex was prepared in two steps. First, 10.0 mL of a 0.100 M stock solution was added to 90.0 mL of solvent to make 100.0 ml. of the first calibration standard solution and, secondly, 80 mL of that first calibration solution plus 20.0 mL of solvent were mixed to make the second calibration standard. What is the concentration of the second calibration standard solution? A 100 mM B) 59 mM 0.14 mM D) 80 mM E) 8.0 mM 8
What is the value of pMg for 50.0 ml of a 0.0500 M Mg 0.0500 m EDTA when 50.0 mL of EDTA is added (Kf = 6.2x10)(ay4- 0.30 )? +2 solution buffered at pH 10.00 and titrated with 1. 05.77 2. 02.88 3. 04.94 4. 01.39 5. 07.96
Alert for not submit AI generated answer. I need unique and correct answer. Don't try to copy from anywhere. Do not give answer in image and hand writing
LI Labflow - report: Report and D MyLab and Mastering Course Home b Answered: If 45.3 ml of 0.116 x B Chromium metal is added to a + -> A openvellum.ecollege.com/course.html?courseld=16418591&OpenVellumHMAC=74a60a0c7d871f5234fbf3111a7fef34#10001 I Review | Constants | Periodic Table Scores Classity these compounds as acid, base, salt, or other. An acid is a compound that produces H+ in solution. You can recognize acid formulas as those that start with H or end with COOH. Drag the appropriate items to their respective bins. Pearson eText • View Available Hint(s) A base is a compound that produces OH in Study Area solution. Base formulas often contain a metal cation with the hydroxide anion, OH. Bases that do not contain OH usually contain N. These þases can react with an H20 molecule to produce Interactive Sample Exercise 4.4 in solution. Reset Help Document Sharing User Settings A salt is an ionic compound that is neither an acid nor a base. To identify a salt, look for a formula that…
Solve the gravimetric problem.
Question 8 - Electrochemistry lab X b My Questions | bartleby x + Courses ezto.mheducation.com/ext/map/index.html?_con=con&external_browser=0&launchUrl=https%253A%252F%252Fnewconnect.mheducation.com%252F#/activity/q... 2 Аpps My STC Mail - Janeth Soto -... CengageNOW | Onl. Hidalgo County Yahoo Mail M HBO Max ScheduleConnect Colonia Self-Help C... E Reading list Electrochemistry lab alternative i Help Save & Exit Submit Saved 8. A concentration cell is constructed with the overall reaction Zn2* (1.0 M) → Zn?+ (0.010 M). What is the E°. cell for this concentration cell? V Mc Graw Hill 8:37 AM Question 8 - Electro... Spotify Premium 5/3/2021
You are a chemist, you know that in the analysis for total hardness, formation of Ca-EDTA complex in the presence of magnesium-calmagite indicator or Mg-Ind complex involves the following process: Based on the chemical reactions provided, what is equivalent to KMg-Ind?