Utilizing Problem-Based Learning in Qualitative Analysis Lab Experiments

Hicks, Randall W.; Bevsek, Holly M.

doi:10.1021/ed1001202

Cited by 45 publications

(44 citation statements)

References 24 publications

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“…From equation [15] you can get the kinetic parameters, = 3.62778, = 0.99861 and = 1.00209 , applying the exponential to the natural logarithm of the kinetic constant is obtained = 37.6292 −1 −1 and rounding up partial orders = 1 y = 1, therefore the overall order of the reaction is two. The reaction occurs in accordance with scheme 2…”

Section: Rapid Values Were Provided At Different Partial Pressures For Analysis In Polymath Softwarementioning

confidence: 99%

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PBL with the Application of Multiple and Nonlinear Linear Regression in Chemical Kinetics and Catalysis

Valdivia¹,

Osornio²,

Vargas-Rodríguez³

2021

EDUCATION

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In the resolution of problems in chemical kinetics and catalysis the mathematical models relate the independent variable that is usually time, with the dependent variable which is normally the concentration of a reactant. They conform to linear models, whose parameters such as the ordering to origin and the slope are kinetic parameters, applying linear regression to the experimental data can be obtained linear models that are the simplest to be found. On other side, multiple models can be found with two or more independent variables, however, there are models that are not feasible to linearize and therefore you can make use of nonlinear regression. This paper is exemplified by the Problem-Based Learning (PBL) scheme and the use of software such as Stat graphics and Polymath to solve the resulting mathematical models. The results obtained are compared with traditional methods as multiple linearized least squares, in this way the learning teaching process is strengthened, since the student raises the kinetic model and then solves it with computer tools. Through the PBL cycles generated in the resolution of real problems in chemical kinetics and catalysis, significant learnings are achieved on difficult comprehension topics such as initial rate for the determination of the reaction order, half-life times, temperature effect and heterogeneous catalysis.

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Section: Rapid Values Were Provided At Different Partial Pressures For Analysis In Polymath Softwarementioning

confidence: 99%

“…The appropriate "good problems" to work in the classroom through PBL cycles, are those defined as open or unstructured, ambiguous, capable of changing and proposing various solutions [11]. The PBL has been applied to the teaching of the Chemical Sciences [12,13,14,15,16] and to the teaching of Physical Chemistry [5,17,18,19,20,21].…”

Section: Introductionmentioning

confidence: 99%

PBL with the Application of Multiple and Nonlinear Linear Regression in Chemical Kinetics and Catalysis

Valdivia¹,

Osornio²,

Vargas-Rodríguez³

2021

EDUCATION

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“…The appropriate "good problems" to work with in the classroom through PBL cycles are those that are defined as open or unstructured, ambiguous, likely to change and to propose various solutions (Edens, 2000). PBL has been applied to the teaching of the chemical sciences Bodner and Bhattacharyya, (2005); Hicks and Bevsek (2012); Flynn and Biggs (2012); Moutinho, Torres, Fernandes, and Vasconcelos (2015); Cowden and Santiago (2016) and the teaching of Physical Chemistry Ramos-Mejia and Palacios-Alquisira, (2007); Da Silva, Vieira, and Ferreira (2013); Gurses, Dogar, and Geyik (2015); Turcio-Ortega and Palacios-Alquisira (2015); Fernández and Aguado (2017); Obaya et al (2018). PBL has been successfully applied in various pharmacy subjects, for example, with an industry-based focus on drug administration courses (Hussain, Sahudin, Samah, & Anuar, 2019) in chemistry courses for teaching functional groups (Perez-Rivero, Obaya Valdivia, Giamatteo, Montaño-Osorio, & Vargas-Rodríguez, 2019).…”

Section: Introductionmentioning

confidence: 99%

Online Applied Problem-Based Learning to Determine the Shelf Life of an on-Site Solution of Refrigerated Drug

Vargas-Rodríguez

Valdivia

Montaño-Osorio

et al. 2020

International Journal of Educational Technology and Learning

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A problem-based online learning (PBe-L) teaching sequence was designed for calculating the shelf life (expiration date) of an on-site solution of refrigerated drug as part of activities of a Pharmaceutical Physical Chemistry course of Pharmacy major at FES Cuautitlán UNAM in Mexico. The teacher presents students the problem, a group collaborative activity is carried out to search for information in PBL cycles. Students are then shown a virtual experiment that includes experimental results. Another group collaborative activity is carried out for the search of information, for the procedural analysis of the results. Applying knowledge and understanding of the topics of chemical kinetics, temperature effect on the rate of chemical reactions and drug degradation reactions, etc., students solve the problem. Hake's factor was determined for the conceptual gain. A Likerttype satisfaction survey was conducted and compared to the results of a group that was applied to the PBL strategy in person. At the end of the sequence students achieved recognition, comprehension and application learnings and conceptual gain was high. Allowing an integration of its cognitive framework of kinetics topics.

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“…Student activities observed included: (1) preparing practical equipment, (2) designing practical work, (3) preparing tools and materials, (3) observing, (4) writing observations, (5) answering lecturer questions, (6) discussion with friends, (7) asking lecturers (feedback), and (8) tidying up andcleaning equipments and materials. Of all the items observed, item (2) has not been implemented/has not been seen, while other activities appear evenly[23][24][25][26][27][28].…”

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confidence: 99%

Analysis of Implementation and Result of Analytical Chemistry Instrument Labwork

Haryani

Dewi

Wardani

et al. 2019

KSS

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The purpose of this research was to obtain an overview about the implementation of analytical chemistry instrument practicum and its learning outcome. The subject of this research was the students of chemistry education program of FMIPA UNNES who took Analytical Chemistry Instrument Practice course. Observations, interviews and ﬁeld noteswerecarriedoutonpracticumrelatedtothemethodofassessment,theactivities of lecturer and students during class, as well as the practical manual. Meanwhile, the instruments that used for learning outcome were verbal pretest, an observation sheet to assess the practicum result, verbal questions when students reported observational data, and assessment sheet of practicum report and its rubric. The assessment was carried out in writing containing the mastery of the concept and knowledge of the procedure, the results of practicum observation data, and the practicum report. The practicum report was assessed without using criteria that are known to students, so that it lacks continuous feedback. In general, students do not understand the basic concepts related to practicum, were less able to explain what was done and were less able to explain the observed tendency, and even did not realize that the measurement results were far from expectation. In the case of writing report, there was a weakness in correlating the data of observations, discussions, and conclusions. It was necessary to pursue a practicum activity that in addition to developing basic skills in conducting experimentsandimprovingunderstandingofconcepts,alsodevelopsproblem-solving skill, and the formation of scientiﬁc attitudes, all of which are netted in well-prepared assessments.

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Utilizing Problem-Based Learning in Qualitative Analysis Lab Experiments

Cited by 45 publications

References 24 publications

PBL with the Application of Multiple and Nonlinear Linear Regression in Chemical Kinetics and Catalysis

PBL with the Application of Multiple and Nonlinear Linear Regression in Chemical Kinetics and Catalysis

Online Applied Problem-Based Learning to Determine the Shelf Life of an on-Site Solution of Refrigerated Drug

Analysis of Implementation and Result of Analytical Chemistry Instrument Labwork

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