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we dilute unknown sample of 25ml to 100ml And want to find error propagation associated with it. The unknown sample concentration is :1.2984 ppm Error: .1958 Class A 25 ml pipet error : .03ml Class A 100ml beaker : .08 I find the unknown concentration but need error associated with it during dilution process Any hints?

we dilute unknown sample of 25ml to 100ml And want to find error propagation associated with it. The unknown sample concentration is :1.2984 ppm Error: .1958 Class A 25 ml pipet error : .03ml Class A 100ml beaker : .08 I find the unknown concentration but need error associated with it during dilution process Any hints?

Chemistry
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
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Problem 1RQ: Define and explain the differences between the following terms. a. law and theory b. theory and...
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Q3 we dilute unknown sample of 25ml to 100ml And want to find error propagation associated with it. The unknown sample concentration is :1.2984 ppm Error: .1958 Class A 25 ml pipet error : .03ml Class A 100ml beaker : .08 I find the unknown concentration but need error associated with it during dilution process Any hints?
ation points. Plot the result. Be sure to show the data POINTS as well as the linear regression model, the equation for the linear regression result, and the R2 value for the resulting fit. Use the LINEST function in Excel to learn the concentration of the analyte solution. Use the error in the intercept as your basis for determining the 95% confidence interval in error associated with the intercept result. (Note, the output from LINEST is $/ n C. d. Report the concentration of your unknown sample with a 95% confidence interval. 3. The answer in 2d should reflect a dilution step taken in the procedure necessary for preparing the samples. This dilution step involves using two pieces of glassware: A 25.0 mL volumetric pipet and a 100 mL volumetric flask. Using the error in the intercept determined in 2c as your basis for the error in your sample, propagate the error accumulated by using class A glassware for preparing the sample for analysis. Report the tolerance directly with the calculated concentration confidence interval. 4. A 50 mL graduated cylinder typically has a tolerance of 1 mL. A 100 mL beaker can be used to about +5 mL. A general chemistry student decided that the volumetric glassware was too much work, so they made their sample solution using a beaker and 50 mL graduated cylinder rather than the more precise, volumetric glassware. Propagate the error for this second scenario. Make a quantitative argument for whether or not using volumetric glassware is the best practice for measuring accurate folumes. 5. Answer the Challenge Questions in your notebook.
Transcribed Image Text:ation points. Plot the result. Be sure to show the data POINTS as well as the linear regression model, the equation for the linear regression result, and the R2 value for the resulting fit. Use the LINEST function in Excel to learn the concentration of the analyte solution. Use the error in the intercept as your basis for determining the 95% confidence interval in error associated with the intercept result. (Note, the output from LINEST is $/ n C. d. Report the concentration of your unknown sample with a 95% confidence interval. 3. The answer in 2d should reflect a dilution step taken in the procedure necessary for preparing the samples. This dilution step involves using two pieces of glassware: A 25.0 mL volumetric pipet and a 100 mL volumetric flask. Using the error in the intercept determined in 2c as your basis for the error in your sample, propagate the error accumulated by using class A glassware for preparing the sample for analysis. Report the tolerance directly with the calculated concentration confidence interval. 4. A 50 mL graduated cylinder typically has a tolerance of 1 mL. A 100 mL beaker can be used to about +5 mL. A general chemistry student decided that the volumetric glassware was too much work, so they made their sample solution using a beaker and 50 mL graduated cylinder rather than the more precise, volumetric glassware. Propagate the error for this second scenario. Make a quantitative argument for whether or not using volumetric glassware is the best practice for measuring accurate folumes. 5. Answer the Challenge Questions in your notebook.
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