Course Contents » ... » Timer Notes Evaluate Feedback Print Inf 3. What type of laboratory glassware is used when the accuracy and precision of volume is critical to quantitative analysis? Enter the one word term, using lower case letters, that represents this type of glassware. Submit Ancwer Tries 0/99

Course Contents » ... » Timer Notes Evaluate Feedback Print Inf 3. What type of laboratory glassware is used when the accuracy and precision of volume is critical to quantitative analysis? Enter the one word term, using lower case letters, that represents this type of glassware. Submit Ancwer Tries 0/99

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...

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If you have to analyze trance benzene and iron concentration in a sediment sample. You have a grinding the sample using ceramic tools in order to break down the sample to small particles. For which analytethe grinding process will cause more error? Selected answer will be automatically saved. For keyboard navigation, press up/down arrow keys to select an answer. To b с d e Iron's analytical result will have larger positive error Benzene's analytical result will have larger positive error Iron's analytical result will have larger negative error Benzene's analytical result will have larger negative error The grinding process will not cause any error of analytical results for both analytes
Please determine the total mg/mL that you were able to recover from the column= experimental yield. Please show your data and calculation Online students the volume is 1.5 mL and the OD 550 is 0.35. Below is a standard curve I generated that you can use. OD 550 vs. mg/mL 4 3. OD 550 1 0 0.2 0.4 0.6 0.8 1.0 mg/mL
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Suppose Marcus needs to transfer 11.50 mL of a liquid with ONLY high precision. Which of the following pieces of glassware provided in the General Chemistry labs (see Appendix A) should Marcus use? Hint: Compare the average percent errors, calculated from the sample data provided, for the buret and pipet trials. O 1.50-mL pipet 25-mL buret O 10-mL pipet with a little over the calibration line O 100-mL beaker
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Perform the following calculations to the correct number of significant figures. [(2.33 x 10^6) / 42.370] + 132.99
Often the analyst will compare known quantities of analyte to unknown quantities of the material to be analyzed. This may be done in one of three ways: -use calibration curves; use standard additions; or use internal standards. The method of standard additions would be used when A) the quantity of sample analyzed or the instrument response varies from run to run. B) the standard solutions and the unknown solution all have similar characteristics are unaffected by the other material in the sample. C) the sample composition is unknown or complex and affects the analytical signal.
ngures. Exercise 1: Standard Curve for Proteln Measurements: A standard curve for protein concentration is often created using known concentrations of bovine serum albumin (protein). This process is called the Bradford Assay; it is a colorimetric assay. A special reagent turns blue when it binds to amino acids present in protein. The intensity of the color is best measured with a spectrophotometer (a device for comparing two light radiations, wavelength by wavelength). In the case of the Bradford Assay the greater the absorbance, the higher the protein concentration. A series of tests were performed on some samples and the following measurements were obtained using a spectrophotometer: Protein Concentration (mg/ml) Absorbance (A) 0,26 0.098 0.56 0.213 0.383 0.84 1.12 0.473 1.40 0.527 TASKS: 1. Enter the data into Excel - the protein concentration is the independent variable. 2. Create a scatter graph of the data that is appropriately titled and labeled (see Introduction). 3. Use the…
explain answer please for 4 & 5
Mass of CaCO3= 0.3185 g Trial VCaCO3 1 25.00 mL 2 25.00 mL 3 25.00 mL Vi (mL) 0.00 0.10 0.50 V EDTA Vf V used (mL) 32.75 32.15 32.83 Average M EDTA MEDTA