scholarly journals Problem Solving in Chemistry: Example of Neutralization Titrations

2021 ◽  
pp. 306-328
Author(s):  
Fatma Alkan
Keyword(s):  
Analytical Chemistry ◽  
Problem Solving ◽  
Teacher Candidates ◽  
Volumetric Analysis ◽  
Chemistry Teacher ◽  
Chemistry Teaching ◽  
Teaching Programme ◽  
Descriptive Survey

Problem-solving is an important skill in analytical chemistry. This study aims to determine how chemistry teacher candidates use volumetric analysis problems and reveal the errors made. The research employs a descriptive survey model. The sample of the study consists of seven chemistry teacher candidates studying in the chemistry teaching programme. Questions requiring comparing the volume spent in NaOH and HNO3, H2SO4, and H3PO4 titrations were asked within the scope of the study. The solution to the problem and explanations were recorded in a video. The results show that there are problems in determining the volume of NaOH. Many students wrote the titration reactions correctly, but there were problems with the effect values. It is noteworthy that those who made mistakes did not understand the first step of the problem. The students can prevent such mistakes with the help of a diagram summarizing the steps to be followed in the titration process.

scholarly journals Analytical Chemistry Laboratory Qualitative Analysis Process Examination: Links Between Experimental Data and Calculations

2021 ◽  
Vol 9 (3) ◽  
pp. 719
Author(s):  
Fatma Alkan
Keyword(s):  
Analytical Chemistry ◽  
Teacher Candidates ◽  
Chemistry Education ◽  
Thinking Skills ◽  
Volumetric Analysis ◽  
Chemistry Laboratory ◽  
Experimental Result ◽  
Chemistry Teacher ◽  
Chemistry Teaching ◽  
Important Place

Analytical chemistry and qualitative-quantitative analysis practices have an important place in chemistry education. Operations such as experimental steps in volumetric analysis, reactions, and determining the amount of matter require problem-solving and higher-order thinking skills due to mathematical calculations. Students have difficulty and anxiety in making calculations in the volumetric analysis. This research aimed to examine the ability of chemistry teacher candidates to use the data obtained from the neutralization titration experiments in the calculation of the experimental result and to analyze the effects of information obtained from experiments on solving volumetric analysis problems. The sample of the study consisted of 13 chemistry teacher candidates studying in the chemistry teaching program of a state university. The research employed a descriptive survey model. Experiment data sheets and question solutions were taken as written answers. As a result of the research, it is noteworthy that the teacher candidates have problems in calculating the results of the experiment, and this has been overcome with increasing applications.

scholarly journals Investigating Problem Solving Skills and Chemistry Learning Experiences of Higher Education Base on Gender and Grade Level Differences

2021 ◽  
Vol 2 (2) ◽  
pp. 62-67
Author(s):  
Dwi Wahyudiati
Keyword(s):  
Problem Solving ◽  
Teacher Candidates ◽  
Grade Level ◽  
Learning Experiences ◽  
Sampling Technique ◽  
Chemistry Teacher ◽  
Cross Sectional Survey ◽  
Cross Sectional ◽  
Problem Solving Skills ◽  
Chemistry Learning

The purpose of this study was to investigate the problem-solving skills (PSS) and chemistry learning experiences (LE) of teacher candidates. 191 pre-service chemistry teacher (130 women, 61 men) were taken as the research sample using the purposive random sampling technique. The research design used a cross-sectional survey with focus group interviews. The quantitative data obtained were analyzed using the MANOVA test and while the interview data using the Patton analysis technique. The research findings show that: 1) the level of the chemistry learning experience of pre-service chemistry teacher (LE) is higher than the ability of problem-solving skills (PSS); 2) the level of ability of female chemistry teacher candidates for PSS and LE was found to be higher than that of males; (3) there are differences in PSS and LE based on grades levels, but there is no difference based on gender; 4) there is a difference in PSS and LE between freshman, sophomore, and junior grades. The findings of the interview are relevant to the results of the survey which proved that male and female students both have positive attitudes towards chemistry, however, it was found that there were differences in PSS and LE between grade level (1stgrade, 2stgrade, 3st grade). Thus, it is suggested that the learning process in universities prioritizes the development of LE and PSS in chemistry learning so as to improve the soft skills and academic achievement of prospective chemistry teachers.

scholarly journals PENGEMBANGAN MODEL PEMBELAJARAN KIMIA ANALITIK UNTUK MENINGKATKAN MUTU PENDIDIKAN GURU KIMIA

2015 ◽  
Vol 3 (1) ◽  
pp. 53
Author(s):  
Mrs Liliasari ◽  
Mrs Siti Darsati
Keyword(s):  
Analytical Chemistry ◽  
Problem Solving ◽  
Creative Thinking ◽  
Representation Formula ◽  
Thinking Skills ◽  
Critical Thinking Skills ◽  
Chemistry Teaching ◽  
Lecture Method ◽  
Power Point ◽  
Problem Solving Process

The aim of the research is to improve chemistry teacher training program quality, use Analytical Chemistry Teaching Model (MPKA). The improvement should be on student higher order thinking skills. The model is consisting of 23 concepts, which include concepts that name process, concepts that have no perceptible instances, concepts which require knowledge of principles, concepts involving symbolic representation, formula and equation. Those concepts arrange in nine hierarchies on concept map. The model of teaching uses: (a) concept and science process skill approach; (b) problem solving and lecture method, and also laboratory activities; (c) transparency and power point media; (d) essay test. Critical thinking skills developed by the model are elementary clarification, basic support, inference and strategy and tactics. Creative thinking skills developed by the model are: (1) encouraging elegant solution of collision conflict, unsolved mysteries; (2) practicing the creative problem solving process in disciplined systematic manner in dealing with the problem and information at hand; (3) examining fantasies to find solution of real problems; (4) heightening anticipation only enough structure to give clues and direction. The model has been implemented to 82 students in three teacher’s training institutions (LPTK) in Java and Bali. The model improves students’ comprehension in Chemistry concepts. It also develops three kinds of logics: group inclusion, proportional and combinatorial. Therefore it is suggested to develop similar models for other courses in perspectives chemistry teachers training program.Key words: Model of teaching, analytical chemistry, critical and creative thinking skills, quality improvement.

scholarly journals THE RELATIONSHIP BETWEEN SELF-EFFICACY AND ATTITUDES OF CHEMISTRY TEACHER CANDIDATES

2015 ◽  
Vol 63 (1) ◽  
pp. 62-70
Author(s):  
Emine Erdem
Keyword(s):  
Analysis Of Variance ◽  
Undergraduate Students ◽  
Self Efficacy ◽  
Teacher Candidates ◽  
Attitude Scale ◽  
Chemistry Laboratory ◽  
Chemistry Teacher ◽  
Chemistry Teaching ◽  
Grade Levels ◽  
The Relationship

This study has been carried out with the aim of investigating the relationship between the attitudes of chemistry teacher candidates towards chemistry in laboratory classes and their self-efficacy beliefs. Teacher candidates composed of undergraduate students who have already taken or are currently taking laboratory classes and study Chemistry Teaching have participated in this study. Relational survey model has been used in this study. Chemistry Attitude Scale (CAS) developed by Geban, Ertepınar, Yılmaz, Altın & Şahbaz (1994) and Chemistry Self-efficacy Scale (CSS) were used as data collection tools. Simple correlation and one-way analysis of variance in independent groups have been used in order to analyse data. According to the results from study data, there is a meaningful linear relationship between self-efficacy scores and attitude scores of teacher candidates. An increase in self-efficacy scores and attitude scores of teacher candidates with regard to consecutive grade levels has also been observed. Self-efficacy and attitude scores of the students have been compared by using one-way analysis of variance (ANOVA). However, a meaningful difference in self-efficacy scores and attitude scores of students with regard to grade levels has not been observed. Key words: chemistry, self-efficacy, chemistry attitude, chemistry laboratory applications.

scholarly journals The effect of Lego Mindstorm projects on problem solving skills and scientific creativity of teacher candidateÖğretmen adaylarının problem çözme becerilerine ve bilimsel yaratıcılıklarına Lego Mindstorm projelerinin etkisi

2019 ◽  
Vol 16 (1) ◽  
pp. 216
Author(s):  
Berkan Avcı ◽  
Fatma Şahin
Keyword(s):  
Problem Solving ◽  
Data Collection ◽  
Science Teachers ◽  
Prospective Teachers ◽  
Teacher Candidates ◽  
English Summary ◽  
Scientific Creativity ◽  
Problem Solving Skills ◽  
Grade Levels ◽  
Lego Mindstorms

In this study; the effects of Lego Mindstorms projects on problem solving skills and scientific creativity of teacher candidates were. The study group consisted of 20 pre-service science teachers. The data were collected quantitatively and qualitatively. Problem solving and scientific creativity  test were used as quantitative data collection instruments. , Teacher Participant Interview was used as qualitative data collection tool. The practice with teacher candidates lasted 9 weeks.  In this process, pre-service teachers learned the software. Then, these teacher candidates were presented with the science problems appropriate to different grade levels and produced solutions to these problems with Lego EV3 Education sets.Results of the study, the participating teacher candidates identified Lego Ev3 Education sets as creative (25.6%), functional (18.7%), educational (20.9%), developmental (20.9%) and informative (13.9%). As a result of the projects carried out with the Lego Ev3 education sets, the problem solving skills and scientific creativity of the prospective teachers developed.Extended English summary is in the end of Full Text PDF (TURKISH) file. ÖzetBu çalışmada; Lego Mindstorms projelerinin öğretmen adaylarının problem çözme becerilerine ve bilimsel yaratıcılıklarına etkisi incelenmiştir. Araştırmanın çalışma grubunu Fen Bilgisi 3.sınıf öğrencisi 20 öğretmen adayı oluşturmuştur. Araştırmada nicel ve nitel veriler toplanmıştır. Nicel veri toplama araçları olarak problem çözme envanteri ve bilimsel yaratıcılık testi kullanılmıştır. Nitel veri toplama aracı olarak da öğretmen görüş anketi kullanılmıştır. Araştırmanın uygulama süreci 9 hafta sürmüştür. Bu süreçte önce öğretmen adayları yazılımı öğrenmiştir. Sonra bu öğretmen adaylarına farklı sınıf düzeylerine uygun fen problemleri sunulmuş ve bu problemlere Lego EV3 Education setleri ile çözüm üretmişlerdir.Çalışmanın sonuçları, araştırmaya katılan öğretmen adaylarının Lego Ev3 Education setlerini: yaratıcı (%25.6), işlevsel (%18.7), eğitimde uygulanabilir (%20.9), gelişimsel (%20.9) ve bilgiyi uygulayabilir (%13.9) olarak tanımladıklarını ortaya çıkarmıştır. Lego Ev3 education setleri ile yapılan projeler sonucunda öğretmen adaylarının problem çözme becerileri ve bilimsel yaratıcılıkları gelişmiştir.

scholarly journals UMA PROPOSTA PARA O ENSINO DE LABORATÓRIO DE QUÍMICA ANALÍTICA QUALITATIVA

Química Nova ◽  
2020 ◽  
Author(s):  
Julia Postigo ◽  
Hellen Barbosa ◽  
Roberta Calefi ◽  
Jany Jesus ◽  
Priscila Cervini ◽  
...  
Keyword(s):  
Analytical Chemistry ◽  
Positive Feedback ◽  
Controversial Issue ◽  
Chemistry Teaching ◽  
Bottom Up ◽  
Teaching Laboratory ◽  
Methods Of Analysis ◽  
Experimental Step ◽  
Instrumental Methods

A PROPOSITION FOR TEACHING LABORATORY OF QUALITATIVE ANALYTICAL CHEMISTRY. Teaching laboratory of qualitative analytical chemistry is still a controversial issue in chemistry courses. However, important researchers and educators in chemistry recognized and highlighted the importance that the contents of this discipline represent in the formation of chemists, once it can provide handling and understanding of microscopic phenomena based on the observation of their macroscopic effects, once such reactions and phenomena are the basis of important instrumental methods of analysis. Thus, a proposal based on a bottom-up approach has been developed, starting with the observation of different reactions of cations in laboratory, followed by a search for the reaction responsible for each resulting phenomenon observed during the experimental step. Then these reactions are related with the separation procedures of each group of cations. Eventually the separation of these groups can also be performed depending on the time available. The proposal has been applied in teaching laboratory of qualitative analytical chemistry at Instituto de Química de São Carlos/USP since 2015, where the discipline is offered duirng 4 hours/week, and a positive feedback regarding the evolution of the methodology and its acceptance by students. Good results were also obtained concerning the appropriation of the contents by the students, using the proposal.

INFLUENCE OF SELF-ANALYSIS AND REFLEXIVE PERSCRUTATION OF PRIE-SERVICE TEACHERS THROUGH VIDEO RECORDING IN CHEMISTRY TEACHERS EDUCATION

2010 ◽  
Vol 7 (1) ◽  
pp. 8-14
Author(s):  
Vitor Zanni ◽  
Agnaldo Arroio
Keyword(s):  
Professional Development ◽  
Discourse Analysis ◽  
Key Words ◽  
Video Analysis ◽  
Video Recording ◽  
Chemistry Teacher ◽  
Chemistry Teaching ◽  
Pedagogical Strategies ◽  
Chemistry Teachers ◽  
Methodological Tool

In this work, we present an approach on methodology of teaching where pre-service chemistry teachers are required to analyze sequences of digital video of chemistry teaching in real classrooms. We utilize discourse analysis to help pre-service chemistry teachers to reflect on their pedagogical strategies and discursive interactions. The results showed that the integration of video analysis on the pre-service chemistry teacher training is an important methodological tool on professional development of chemistry teachers. Key-words: pre-service education, video, chemistry teacher, ICT.

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