One of the fundamental learning outcomes in our department is acquiring proficiency in performing data analysis.  Students spend a great deal of time practicing this skill throughout our entire lab curriculum, starting in their first year.  Because many general chemistry students go on to major in other sciences, we chose a lab practical that focuses on standard curves as it is a data analysis tool important to all areas of science and they have practiced it repeatedly in both semesters.  In an effort to evaluate this skill, we have created two hands-on lab practical assessment tools that are given in the second semester that evaluate 1) preparation of solutions with precise concentrations and 2) creating and using a standard curve and 3) measuring pH to determine concentrations of acids and bases.  We have found a significant correlation between student scores on the exams and their contribution to their partnerships during weekly labs.<br/> <br/>The first year we used the assessment we only gave a final exam at the end of the second semester.  Based on the results of the exam, and the stress level of the students, the following year we implemented a low stakes midterm exam as an introduction to this type of examination.  The midterm exam (1.5 hours) requires students to prepare two solutions.  The final exam (3 hours) requires them to repeat the tasks from the midterm, as well as to perform a visible spectroscopy experiment and pH experiment using Vernier equipment. Both exams are graded on the accuracy of their solution preparation, and for the final, we also evaluate their pH and absorbance values. This raises the stakes to simulate what it would be like to perform these tasks in a professional or research setting.

Lab practical that rewards independence and accuracy

Macromolecular Chemistry: The Second Century

[Author Benefits](https://scimeetings.acs.org/?utm_source=pubs_content_marketing&utm_medium=website&utm_campaign=0320_MCF_NPI_Launch_Spring_Homepage&ref=pubs_content_marketing)

[How to use SciMeetings](https://storage.googleapis.com/dl.morressier.com/acs/SciMeetings-ACSSpring2020-HowToGuide_M3020-Final.pdf)

[Frequently Asked Questions](https://storage.googleapis.com/dl.morressier.com/acs/SciMtng_ACSNMSp2020_FAQ_M3120_Final.pdf)

ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.