Is Your Henderson-Hasselbalch Calculation of Buffer pH Correct?

Article Chemistry, Multidisciplinary

Student Conceptions of pH Buffers Using a Resource Framework: Layered Resource Graphs and Levels of Resource Activation

Mary A. W. Sheppard et al.

Summary: This study investigates how students approach conceptual buffer problems using the phenomenographic method and a resource theoretical framework. The study identifies three levels of resource activation: Surface Features, Building Connections, and Interconnected. Some resources were consistently activated in all questions, while others were context-dependent. Challenges were observed in activating crucial resources and maintaining activations. The study provides specific suggestions on establishing connections between resources to promote higher-level resource activation.

JOURNAL OF CHEMICAL EDUCATION (2023)

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Article Chemistry, Multidisciplinary

Graphical Application to Assist Students Understand the Basic Concepts in Acid-Base Titrations

L. S. Lanka K. Fernando et al.

Summary: This research aims to introduce an MS Excel application for studying theoretical concepts related to acid-base titrations. The application allows students to visualize the pH change, buffer region, and the impact of reagent concentrations and Ka/Kb values on titration curves, enhancing their understanding of the subject.

JOURNAL OF CHEMICAL EDUCATION (2022)

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Article Chemistry, Multidisciplinary

Survey of the Undergraduate Analytical Chemistry Curriculum

Michelle L. Kovarik et al.

Summary: The survey of 322 analytical chemistry instructors in Spring 2021 revealed that most courses require students to take two analytical chemistry courses, with over 80% also requiring an analytical lab course. Calibration methods were rated as the most important topic, with many other key topics being taught in required courses and hands-on laboratories.

JOURNAL OF CHEMICAL EDUCATION (2022)

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Article Chemistry, Multidisciplinary

Incorporating Guided-Inquiry Experimental Design into a Traditional Buffer Titration Experiment

Shirley Lin et al.

Summary: This article discusses the transformation of a traditional confirmation experiment into a guided-inquiry experience to improve student understanding of buffer systems. The revised experiment allowed students to formulate their own procedures and determine the concentration of an unknown sample.

JOURNAL OF CHEMICAL EDUCATION (2022)

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Article Chemistry, Multidisciplinary