Artikel Pendidikan Kimia Pdf Merge
Asam basa jurnal pdf at grbookshop.com - Download free pdf files,ebooks and documents of asam basa jurnal pdf Home. Home » Artikel » jurnal stoikiometri kimia. Jurnal laporan kimia stoikiometri. Kimia dalam jurnal penelitian pendidikan kimia pdf Berbicara mengenai jurnal penelitian yang berisi materi akan pelajaran kimia. Artikel Contoh Jurnal Ilmiah Pendidikan Kimia Pdf. This research is a classroom action research, which aims to finalize students’ learning ability in Basic Chemistry course I through the application of learning model based on problem.
Journal of Education and Practice ISSN 2222-1735 (Paper) ISSN 2222-288X 288X (Online) Vol 3, No 12, 2012www.iiste.orgDifficulties faced by Nigerian Senior School Chemistry Students in solving Stoichiometric ProblemsJ. Upahi1* and A.S. Olorundare2, Ph. Chapel Secondary School, P.
Artikel Pendidikan Pdf
1572, Tanke, Ilorin, Kwara State, Nigeria. Department of Science Education, University of Ilorin, P. 1515, Ilorin, Nigeria.
E-mail mail of the corresponding author: johnsonenero@yahoo.com Abstract The paper investigated the difficulties faced by senior school students (age 16 18) in solving stoichiometric problems. The data were collected from twelve Science, Technology and Technical Education Board (STTEB) schools in Nigeria. A problem solving model that is due to Ashmore, Frazer & Casey (1979) was used. The results revealed that only 1.3% of the students solved the problems correctly, 59.6% of the students scripts analyzed showed that students could not relate the the known with the unknown variables. Borderlands 2 level 50 solo afk. The most common difficulties identified were in relating the known with unknown variables and retrieving information from memory for critical reasoning through the problem. Recommendations for teachers on how to improve students problem solving strategies are given.
After reading so many great reviews about the product, I had to try it myself to really understand why everybody was raving about it. I love to use it at night on my ends before going to bed. S-curl activator on natural hair. It is pretty good, y’all!
Key words: stoichiometric problems, difficulties faced, problem solving, students performance, nature of difficulties. Introduction According to Johnstone (2006) Chemistry is a difficult subject for students. The difficulties may lie in the capabilities of human learning as well as in the intrinsic nature of the subject. Chiu (2005) believes that Chemistry is a world filled with interesting phenomena, appealing experimental activities, and fruitful knowledge kno for understanding the natural and manufactured world.
However, it is complex. As a result of the difficult and complex nature of chemistry and also the fact that it is one of the most conceptually difficult subjects on the school curriculum, it is of major importance that anyone teaching chemistry is aware of the areas of difficulty in the subject. The concepts and principles in chemistry range from concrete to abstract. Many students of chemistry find certain concepts difficult to comprehend. The root root of many of these difficulties that students have in learning chemistry is traceable to inadequate understanding of the underlying concepts of the atomic model, and how these are used to explain macroscopic properties and laws of chemistry (Ben-Zvi, (Ben Zvi, Eylon E and Silberstein, 1988) Stoichiometry (pronounced stoy-key key-AHM-uh-tree; Greek stoicheion, element or part, + metron, measure) is the study of the quantitative aspect of chemical formulas and reactions. For example, if what is in a formula or reaction tion is known, then, stoichiometry tells us how much. It basically involves relating the mass of a substance to the number of chemical entities (atoms, molecules, or formula units); converting the result of the composition analysis into a chemical formula; and applying the quantitative information held within them.
Artikel Pendidikan Indonesia
A review of the literature revealed that the mole and reaction stoichiometry concepts pose difficulty to students (Hackling & Garnett, 1985). Besides, Besides it is a task of problem solving for most students tudents of chemistry (Olmsted, 1999; Goering-Boone & Rayner-Canham, Canham, 2001). It also involves writing and balancing chemical equations, stoichiometric coefficients, limiting reagents, mole ratios of reactants and products, theoretical yields and percent yields (Perera Perera & Wijeratne, 2006). The major reason why students have problems with these concepts is their abstractness. For solving stoichiometry problems, in addition to demonstrating an understanding of chemical reactions, the student must be able to apply the principles involved in ratio and proportion calculations In order to actually calculate the quantities of substances consumed or produced in a chemical reaction, it is dependent on first writing a correct and balanced chemical equation for the reaction(s). (Mulford ( & Robinson, 2002; Tth & Sebestyen,, 2009) reported that students have difficulties to distinguish or identify the limiting reagent which is a sub-topic topic of stoichiometry.
They are frustrated when a simple proportion of moles are not one by one (Perera Perera & Wijeratne, 2006). Some students might also think that the limiting reagent is a fundamental part of a reaction in preference to a function of the amounts of reagent available for a reaction (Boujaoude and Barakat, 2003). In a previous study conducted onducted by BouJaoude & Barakat (2000), forty Year 11 students were required to provide explanations when solving eight stoichiometry problems. These students successfully solved traditional problems using algorithmic strategies, but lacked conceptual understanding understanding when solving unfamiliar problems. Similar findings have also been documented with introductory college chemistry students (Chandrasegaran, ( et al.