Mass of sampleMass of filter paper + AgClMass of filter paperMass of AgClMass of Cl in original sample(show calculations)Percent chloride in original sample(show calculations)Extcon breGravimetric Analysisof a Chloride SaltStandard deviation (show calculations)17Relative standard deviation expressedas a percent (show calculations)Trial 10.384381-2590.539Average percent chloride (show calculations)0.719Trial 20.3155 g1.2290.52g0.7911Trial BDo any of your results differ from the mean by more than two standard deviations?Reported percent chloride±%09EV40

Trial 1:Mass of sample = 0.3843 gMass of AgCl = 0.72 gTrial 2:Mass of sample = 0.3155 gMass of AgCl = 0.7 gIt is required to calculate % of Cl, average % of Cl and RSD for the same.Trial 1:Molar mass of AgCl = 143.32 g.molMolar mass of Cl = 35.43 g/mol143.32 g of AgCl contains 35.43 g ClCalculate mass of Cl in 0.72 g of AgCl as shown below:Mass of Cl is 0.178 gAs all Cl will be precipitated as AgCl, calculate the % of Cl in the sample as shown below:% of Cl in sample is 46.32%Trial 2:Calculate mass of Cl in 0.70 g of AgCl as shown below:Mass of Cl is 0.173 gAs all Cl will be precipitated as AgCl, calculate the % of Cl in the sample as shown below:% of Cl in sample is 54.83%Average % Cl = (46.32% + 54.83%)/2 = 50.58%Average % Cl is 50.58%Standard deviation:% of Cl% of Cl - mean(% of Cl - mean)246.3246.32 - 50.58 = -4.26(-4.26)2 = 18.1554.8354.83 - 50.58 = 4.25(4.25)2 = 18.06Sum : 18.15 + 18.06 =36.21So, standard deviation is 4.255.Relative standard deviation or RSD is calculated as shown below:So, % RSD = 8.41%standard deviation = 4.2552(standard deviation) = 2*4.255 = 8.51Clearly, the % of Cl in two trials do not differ by more than twice of standard deviation from mean.Reported % Cl = 50.58 8.41% (in terms of RSD)All the answers have been indicated in bold and underlined form in each step.

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Mass of sample Mass of filter paper + AgCl Mass of filter paper Mass of AgCl Mass of Cl in original sample (show calculations) Percent chloride in original sample (show calculations) OMA xohy Batson bros Standard deviation (show calculations) Trial 1 0.38438 Average percent chloride (show calculations) Relative standard deviation expressed as a percent (show calculations) 1-259 0.53g 0.719 Trial 2 0.3155 8 1.809 0.52g 2.79 Do any of your results differ from the mean by more than two standard d Reported percent chloride ± %

Mass of sample Mass of filter paper + AgCl Mass of filter paper Mass of AgCl Mass of Cl in original sample (show calculations) Percent chloride in original sample (show calculations) OMA xohy Batson bros Standard deviation (show calculations) Trial 1 0.38438 Average percent chloride (show calculations) Relative standard deviation expressed as a percent (show calculations) 1-259 0.53g 0.719 Trial 2 0.3155 8 1.809 0.52g 2.79 Do any of your results differ from the mean by more than two standard d Reported percent chloride ± %

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

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Question

Mass of sample
Mass of filter paper + AgCl
Mass of filter paper
Mass of AgCl
Mass of Cl in original sample
(show calculations)
Percent chloride in original sample
(show calculations)
Extcon bre
Gravimetric Analysis
of a Chloride Salt
Standard deviation (show calculations)
17
Relative standard deviation expressed
as a percent (show calculations)
Trial 1
0.38438
1-259
0.539
Average percent chloride (show calculations)
0.719
Trial 2
0.3155 g
1.229
0.52g
0.79
11
Trial B
Do any of your results differ from the mean by more than two standard deviations?
Reported percent chloride
±
%
09
EV
40

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