Students explore a variety of gravimetric analysis procedures when completing this activity.
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Students explore a variety of gravimetric analysis procedures when completing this activity.
Students explore examples of the limit of detection when completing this activity.
Students examine an article on measuring internal azole and pyrethroid pesticide concentrations in Daphnia magna using QuEChERS and GC-ECD—method development with a focus on matrix effects
Students learn to:
Prepare a linear calibration curve from experimental data.
Perform a linear fit, including regression statistics, in Excel.
Use a calibration curve to determine the quantity of an unknown.
Discuss the limitations of a calibration curve.
After completing this activity, students will be able to: Choose appropriate glassware for solution preparation Demonstrate proper solution preparation Dilute and recalculate the original concentration of solution
Students explore calculations of concentration related to dilutions and the propagation of error when performing dilutions.
After completing this activity, students will be able to: Convert between different types of concentration units. Calculate the final concentration of a solution following dilution(s). Determine the original amount of an analyte in a sample following quantitative sample preparation.
After completing this activity, students will be able to: Choose the appropriate piece of glassware to ensure the desired level of precision of a particular solution. Compare the tolerance of various pieces of glassware.
Students learn to: Determine volumes and concentrations in dilution calculations.
Convert between different concentration units (e.g., ppm to M).
Interpret a procedure for making a particular solution and assess the advantages of different dilution schemes.
Choose the appropriate piece of glassware to ensure the desired level of precision of a particular solution.
Compare the tolerance of various pieces of glassware.
Students learn to: Apply concepts of accuracy, tolerances, and significant figures to a practical laboratory scenario.
Develop scientific “common sense”.
Communicate (oral and written) scientific concepts related to calibration and standardization.
Students learn to:
To recognize and use fundamental SI units
To identify and use the correct number of SFs in problem-solving and lab
To be able to calculate solution concentrations and interconvert between units