1. Mia, Kayla, and Eli have all set up lemonade stands in their neighborhood. Each person started with the same amount of lemon juice and then added different amounts of sugar, as shown in the table below. Type in the answer for the total weight of each person's lemonade. Lemon Juice Sugar Mia 200 grams 10 grams Кayla 200 grams 20 grams Eli 200 grams 30 grams

1. Mia, Kayla, and Eli have all set up lemonade stands in their neighborhood. Each person started with the same amount of lemon juice and then added different amounts of sugar, as shown in the table below. Type in the answer for the total weight of each person's lemonade. Lemon Juice Sugar Mia 200 grams 10 grams Кayla 200 grams 20 grams Eli 200 grams 30 grams

Principles of Instrumental Analysis

7th Edition

ISBN:9781305577213

Author:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

Publisher:Douglas A. Skoog, F. James Holler, Stanley R. Crouch

ChapterA1: Evaluation Of Analytical Data

Section: Chapter Questions

Problem A1.22QAP

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Table of caffeine standards concentration . Sample Conc, ppm Std1 16 Std2 32 Std3 48 Std4 64 Std5 80 If the volume used to make 100 mL of std 1 is 2 uL what is the concentration in M used to make std calibration curve ? The standards are going to be used to build calibration curve to analyze caffeine in an energy drink. if 500 mL of the energy drink has target of 400 mg , how will you prepare the sample if you need 10 mL for the analysis ? Caffeine MM=194.19 g/mol.
During lab, a student used a Mohr pipet to add the following solutions into a 25 mL volumetric flask. They calculated the final volumes added, which are recorded below. The student then followed the directions in the manual to make the stock solution. Volumes Used to Create Stock Solution Volume 0.200 M Fe(NO3)3 (mL) Volume 0.00200 M KSCN (mL) Stock Solution 9.60 mL 2.55 mL Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the concentration of iron(III) thiocyanate ion in Standard 2. For grading purposes, report your answer in mM with four places after the decimal.
During lab, a student used a Mohr pipet to add the following solutions into a 25 mL volumetric flask. They calculated the final volumes added, which are recorded below. The student then followed the directions in the manual to make the stock solution. Volumes Used to Create Stock Solution Volume 0.200 M Fe(NO3)3 (mL) Volume 0.00200 M KSCN (mL) Stock Solution 8.99 mL 2.38 mL Using the stock solution above, the student made additional dilutions, with the final volumes below. Calculate the [FeSCN2+] in Standard 2. Report your answer in mM. Volumes Used to Create Standard Solutions Solution Volume Stock solution (mL) Volume Water (mL) Standard 1 7.04 3.47 Standard 2 4.72 5.13 Standard 3 2.71 7.43 Standard 4 1.41 9.14 Note: Reporting your answer in mM is for grading purposes only. It is not necessary during lab. Report your answer to three places after the decimal.
idea how gravimetric analysis provides accurate results despite of it being time consuming
Does it possible to use gravimetric analysis to quantiify certain parameters as indicators of quality in squash soup? If yes, please explain the process
Chemistry 1. If your 10 g sample contains 200 µg H2O, calculate the water concentration of your sample in ppm (i.e., µg water per g of sample)? Do not include units in your numeric answer. 2. Calculate the water content of your tablet sample (specimen) as a % wt/ wt: Given: 4g tablet sample was weighed, and S (= KFR volume consumed by sample during titration) = 6.00 mL Submit your answer to 2 decimal places. Do not include the % symbol; only numeric values allowed in your answer.
I would need help with these questions. The method referenced above was followed by a student and she got the following results: Caffeine Std. Conc. (ppm) Absorbance 100 1.806 50 0.899 40 0.724 30 0.545 20 0.365 10 0.183 Further, she analyzed an unknown sample and she got the following results: Sample # Absorbance 1 0.398 1. Graphically find the concentration in ppm and then calculate in mol/L of Caffeine in Sample #1? 2. Which solvent was used to extract Caffeine and why? Why is it necessary to do extraction three times? 3. Cuvettes used in this experiment were made from which material and why? 4. At what wavelength the Absorbance was measured?
I got a task in analytical chemistry to calibrate, standardize, verify and validate an analytical balances, can you help me?
For problem 5, the density of the sample is 0.9977 g/mL and the molar mass of calcium carbonate is 100.0 g/mol. 5. As described in Topic 2, the hardness of water is expressed in terms of amount of calcium carbonate according to the ppm expression. a. Calculate the mass of calcium carbonate present in a 50.00 mL sample of an aqueous calcium carbonate standard, assuming the standard is known to have a hardness of 75.0 ppm (hardness du to CaCO3). b.Calculate the number of moles of calcium ions present in this 50.00 mL sample of aqueous calcium carbonate standard. c. The 50.00 mL sample (at pH 10) was titrated with a 0.00500 M EDTA solution, i. Write the balance net ionic equation for the reaction of EDTA4- with a calcium ion. ii. Calculate the number of moles of EDTA4- needed to completely react with calcium ions in the sample. iii.What volume (in milliliters) of EDTA solution would be needed to reach the equivalence point? This problem was partly answered but I am wondering what…
How would I solve Problem 4? I have the excel graph as provided. Need to get the %Mn I have some small idea but think is wrong... would be... %Mn = 500mL * 1molMn/ g MnO4 * 1molMn/1molMnO4- * gMn/1molMn * 100%/SampleMassg
Solve the required of the following and show the complete process to be able to gain the value of the correct answer. Given: Volume of Vinegar used (ml) = 25.00 mL Volume after dilution = 250.00 mL Volume of Aliquot used (ml) = 50.00 mL Volume NaOH used (ml) = 34.85 mL Concentration of NaOH = 0.09919475765 M Required: Calculate % (w/v) CH3COOH = ? P.S. Use weight in grams and volume of vinegar in mL, but correction based on aliquot should be made.
Data of milk: (first trial) Mass of milk: 104.4579g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 5.5 mL Data of milk: (2nd trial) Mass of milk: 103.8405g Concentration of NaOH (M): 0.09639 Volume of NaOH solution used: 5.3 mL