scholarly journals Chemical Reactions Occurred in Oxide Glasses and Their Melts and Evaluation by Acid-Base Concept: NMR Investigation of Multi-Component Silicate Glasses

2004 ◽  
Vol 112 (1309) ◽  
pp. 467-471 ◽  
Author(s):  
Takashi MAEKAWA
Keyword(s):  
Chemical Reactions ◽  
Silicate Glasses ◽  
Oxide Glasses ◽  
Acid Base ◽  
Base Concept

Acid-base concept in oxide glasses

1987 ◽  
Vol 110 ◽  
pp. 443-447 ◽  
Author(s):  
M.M. Shultz ◽  
N.M. Vedishcheva ◽  
B.A. Shakhmatkin
Keyword(s):  
Oxide Glasses ◽  
Acid Base ◽  
Base Concept

scholarly journals Green Chemistry Based Interactive Multimedia on Acid-Base Concept

2019 ◽  
Vol 1364 ◽  
pp. 012006
Author(s):  
M. Yustiqvar ◽  
G Gunawan ◽  
S Hadisaputra
Keyword(s):  
Green Chemistry ◽  
Interactive Multimedia ◽  
Acid Base ◽  
Base Concept

scholarly journals Imparting gas selective and pressure dependent porosity into a non-porous solid via coordination flexibility

2019 ◽  
Vol 6 (9) ◽  
pp. 1883-1891 ◽  
Author(s):  
Shyamapada Nandi ◽  
Phil De Luna ◽  
Rahul Maity ◽  
Debanjan Chakraborty ◽  
Thomas Daff ◽  
...  
Keyword(s):  
Porous Solid ◽  
Acid Base ◽  
Base Concept ◽  
Soft Acid

Using a simple hard–soft acid–base concept we have deliberately designed gas-specific and pressure dependent porosity into a non-porous solid via coordination flexibility.

The role of green chemistry activities in fostering secondary school students' understanding of acid–base concepts and argumentation skills

2016 ◽  
Vol 17 (4) ◽  
pp. 893-901 ◽  
Author(s):  
Mageswary Karpudewan ◽  
Wolff Michael Roth ◽  
Devananthini Sinniah
Keyword(s):  
Secondary School ◽  
Green Chemistry ◽  
Chemistry Curriculum ◽  
Acid Base ◽  
School Students ◽  
Significant Treatment ◽  
Student Centered ◽  
Base Concept ◽  
Quasi Experimental ◽  
The Individual

In a world where environmental degradation is taking on alarming levels, understanding, and acting to minimize, the individual environmental impact is an important goal for many science educators. In this study, a green chemistry curriculum—combining chemistry experiments with everyday, environmentally friendly substances with a student-centered approach that includes student–student discussion—was tested for its potential to increase the understanding of acid–base concepts and argumentative skills. A quasi-experimental design was chosen intended to take into account teacher/school nested effects. The study involved three classes of 150 16 year old Form Four students (1 experimental,N= 50; 2 control,N= 100) from two Schools A and B serving students from the same sociocultural and economic backgrounds taught by two teachers (Teacher A in School A taught 1 experimental and 1 control; Teacher B in School B taught 1 control). An ANCOVA with a pre-test as a covariate showed a statistically significant treatment effect as measured by an acid–base concept understanding test. Additionally, qualitative analysis of an Argumentation Skill Test (AST) shows that the experimental students used higher levels of argumentation skills following treatment than their peers in the two control classes. Implications are discussed for integrating green chemistry into the secondary school chemistry curriculum to teach the content on acid–base and green chemistry as a tool to assist the construction of arguments.

scholarly journals TO THE ISSUE OF FINDING THE STOICHIOMETRIC COEFFICIENTS IN THE CHEMICAL REACTIONS

2021 ◽  
Vol 2 ◽  
pp. 19-48
Author(s):  
Jekaterina Aleksejeva ◽  
Sharif Guseynov
Keyword(s):  
Chemical Reactions ◽  
Redox Reactions ◽  
Algebraic Equations ◽  
Computer Implementation ◽  
Acid Base ◽  
Linear Algebraic Equations ◽  
Ill Posed ◽  
Computational Errors

In the present paper, on the basis of the theory of inverse and ill-posed problems, an algorithm is proposed that allows to unambiguously determine the stoichiometric coefficients in the equations of chemical reactions of any type, including redox reactions and acid-base reactions, and, regardless of whether the constructed system of linear algebraic equations for the desired stoichiometric coefficients is underdetermined (i.e. there are fewer equations than unknowns) or overdetermined (i.e. there are more equations than unknowns). The proposed algorithm is a regularized algorithm (according to Tikhonov), which ensures that, in a computer implementation, possible computational errors will not make the comprised system of linear algebraic equations to be incapable of solving.

scholarly journals Chemical Shifts of SiKα and SiKβ in Silicate Glasses and AlKα in Oxide Glasses

1983 ◽  
Vol 47 (12) ◽  
pp. 1063-1067 ◽  
Author(s):  
Hiroyuki Ikeda ◽  
Yasuyuki Murayama ◽  
Yasuto Ohoka ◽  
Kenji Morinaga ◽  
Tsutomu Yanagase
Keyword(s):  
Chemical Shifts ◽  
Silicate Glasses ◽  
Oxide Glasses
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