A 300 g of a sample is analyzed by series of sieving. The results report were aperture (micrometer) 295 211 152 ac.over size 100 80 30% finer 20 70% This analysis is viable because all the particles passed the series of sieving, and the %finer is .complementary with the % accumulative oversize True O False O

A 300 g of a sample is analyzed by series of sieving. The results report were aperture (micrometer) 295 211 152 ac.over size 100 80 30% finer 20 70% This analysis is viable because all the particles passed the series of sieving, and the %finer is .complementary with the % accumulative oversize True O False O

Appl Of Ms Excel In Analytical Chemistry

2nd Edition

ISBN:9781285686691

Author:Crouch

Publisher:Crouch

Chapter2: Basic Statistical Analysis With Excel

Section: Chapter Questions

Problem 4P

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Sample IdentificationCodeConcentration of M%TA=2-log(%T)Q50004.00 x 10-417.90.75Q50013.20 x 10-425.00.6Q50022.40 x 10-435.70.46Q50031.60 x 10-450.20.3Q50048.000 x 10-570.80.15SampleIdentificationCode%TA=2-log(%T)AMQ0210150143.70.359518560.360.000192Q0210150244.10.355561410.360.00018Q0210150343.80.358525890.360.00017Q0210150444.10.355561410.360.00018Q0210150543.80.358525890.360.00017What was their percent error?43%Does Batch 021015 meet legal requirements?No, because it is not between 2.85 * 10(4) and 3.15 * 10(4)Well #DropsBluedye1234567891012345678910Drops 9Distilled water876543210Concne 0.26tration0.52Test Tube #0.781.041.3Solutions3Concentration (M)2.082.32.6Concentration (ppm)1:1 dilution11.82Starting Dilution21.562:1 dilution0A.Zero standard0Was your calibration curve as linear as you expected?B.Did you experience any â€œdriftâ€ of the resistance readings?C.What is the equation of your best-fit line?D.What commercial drink did you analyze?E.Assuming…
3. Identify the data set with the highest (a) precision and (b) accuracy. Data set Certified true Mean Standard Percent Error value deviation 1 0.500 0.444 0.041 2 1.00 1.33 0.253 50.00 45.20 0.041 100.0 99.1 3.22 23 3 4 CO
Calculate the mean and 90% confidence interval for the data set. Sample Value 1 8.0626 8.0650 3 8.0583 4 8.0564 8.0571 6. 8.0600 mean: étv A A hulu 2. 5.
[References) A method for the determination of the corticosteroid methylprednisolone acetate in solutions obtained from pharmaceutical preparations yielded a mean value of 3.7 mg mL with a standard deviation of 0.3 mg mL. For quality control purposes, the relative uncertainty in the concentration should be no more than 3%. How many samples of each batch should be analyzed to ensure that the relative standard deviation does not exceed 9% at the 95% confidence level? samples
5. Sketch following: cubic: (111), (01-1) and , Deriu uith
. Experimental data mass (g) and volume (mL) of a substance was gathering, recorded, and plotted in Figure 1. a. Correctly la bel the graph axis (include units). b. The equation for the trendline (y = mx + b) is displayed on the graph. Which variable, in the equation, equals the density of the substance? A1 feMass B D Mass Volume 2. 1,8 2,19 Mass vs. volume 3 3,15 4,08 4,13 5,57 7. 6,7 8,34 6. y= 0,794x-0.064 8 6. 10 11. 2 4. 10 13 14 15 Figure 1: Plotting of Mass vs. Volume of a Substance. bttps://www.chemisalforums.com/index.php?toric=69575.0 Life University CHM 111 March 2021 Default Page Style English (USA)
The method described above is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative error resulting from a 0.4-mg loss is not to exceed a. -0.1% b. -0.8%
Based on the given data, what is the λmax of cobalt? 0.1M Cobalt 300 0.451 325 0.467 350 0.584 375 0.629 400 0.694 425 0.673 450 0.541 475 0.433 500 0.423 525 0.327 550 0.264 575 0.245 600 0.233 625 0.211 650 0.189 675 0.187 700 0.165
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.
9. The method described in Problem 5-8 is to be used for the analysis of ores that assay about 1.2% gold. What minimum sample mass should be taken if the relative error resulting from a 0.4-mg loss is not to exceed(a) -0.1%? (b) -0.4%? (c) -0.8%? (d) -1.1%? Here is the number 5-8 5. Describe at least three ways in which a systematic error might occur while using a pipet to transfer a known volume of liquid.6. How are systematic method errors detected?7. What kind of systematic errors are detected by varying the sample size?8. A method of analysis yields masses of gold that are low by 0.4 mg. Calculate the percent relative error caused by this result if the mass of gold in the sample isa. 500 mg. b. 50 mg. c. 150 mg.d. 70 mg.
Explain the difference between random sampling and haphazard sampling as used in Analytical chemistry.
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