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Mercury(II) Removal with Modified Magnetic Chitosan Adsorbents
Mercury(II) Removal with Modified Magnetic Chitosan Adsorbents

... In the spectra of CS–Hg(II) and CSm–Hg(II), the interactions were mainly affirmed by the reduction of the intensity of the peak assigned to the –NH group in amine, confirming that nitrogen atoms are the main adsorption sites for Hg(II) adsorption on CS and CSm. It is well known that nitrogen–ligand ...
Chapter 1 Introduction: Matter and Measurement
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... • Na(11e) close to the noble gas Ne(10e), so Na is going to lose 1 e, Form Na+ ...
CHAPTER 16 ACID-BASE EQUILIBRIA AND SOLUBILITY
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... pH = 4.44 Could you have predicted whether the pH should have increased or decreased after the addition of the sodium acetate to the pure 0.40 M acetic acid in part (a)? An alternate way to work part (b) of this problem is to use the Henderson-Hasselbalch equation. pH = pKa + log ...
Chemistry Honours - SCS Autonomous College
Chemistry Honours - SCS Autonomous College

... of Kapustinskii expression for lattice energy, Madelung constant, Born-Haber cycle and its application, Solvation energy (ii) Covalent bond: Lewis structure, Valence Bond theory (Heitler-London approach) Energetics of hybridization, equivalent and non-equivalent hybrid orbitals. Bent’s rule, Resonan ...
Problem 1-2
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... today’s air with the main component nitrogen. The main component A of the first atmosphere and the compounds ammonia and water react to form the second atmosphere with its gaseous main product B and two gaseous side products C and D: ...
Multiple Choice Exam Review June 2016
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... d. atoms which both have equally low ionization energies e. atoms which have low but unequal ionization energies According to VSEPR theory, molecules adjust their shapes to keep which of the following as far apart as possible? a. pairs of valence electrons d. mobile electrons b. inner shell electron ...
Physical Sciences Grade 12 Term 2
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... The very high frequency that ultrasound has a small wavelength. Therefore it can be ...
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Unit F325 - Equilibria, energetics and elements
Unit F325 - Equilibria, energetics and elements

... ALLOW –32.4 kJ OR –32400 J (Units must be shown) Award all 5 marks above for correct answer with no working IF 25 ºC has been used instead of 298 K, correctly calculated ∆G values are = –87 kJ mol–1 OR –87000 J mol–1 4 marks are still available up to this point and maximum possible from (e)(i) is 5 ...
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... Explain how vacancies are introduced in a solid NaCl crystal when divalent cations (M2+) are added to molten NaCl. ...
1049-1060 Reeder.pm - Mineralogical Society of America
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Dynamic Equilibria in Solvent-Mediated Anion, Cation and Ligand
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AS Chemistry Teacher Handbook
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The Determination of the Location of Contact Electrification-Induced Discharge Events
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Chemsheets AS 1027
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HOTS Worksheet
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... Ans. The (— CO — NH —) amide bond in nylon gets hydrolysed. Q. 2. Fibres are of crystalline structure. Why ? Ans. Fibres have strong intermolecular forces of attraction which leads to close packing of their chains and impart crystalline structure. Q. 3. Which artificial polymer is present in bubble ...
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Schaum`s Outline of Theory and Problems of
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A New Synthetic Method for Nanoscale Metal-
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... resulting from their small size. Chapter 3 describes the validation of the Spray-Drying (SD) technique as a new methodology to synthesise NMOFs and their related hollow superstructures. The impact of the main experimental parameters on the synthesis of NMOFs is given as well as the different modes o ...
Cyanuric Acid and Cyanurates
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... The sodium salt of cyanurtricyanamide (C3N3)(CN2H)3 was synthesized in [43]. This compound contains the (C3N3)(CN2)3– anion, which evidently can be used as the binding unit in the production of various polymers. The reaction of C3N3Cl3 with HI gives an amorphous brown compound (CNI)x [8] that decomp ...
Fundamentals of Environmental Chemistry
Fundamentals of Environmental Chemistry

... reader knows nothing of the meaning of these terms. Chapter 2 discusses matter largely on the basis of its physical nature and behavior, introducing physical and chemical properties, states of matter, the mole as a quantity of matter, and other ideas required to visualize chemical substances as phys ...
IIT-JEE - Brilliant Public School Sitamarhi
IIT-JEE - Brilliant Public School Sitamarhi

... Point defects: When ions or atoms do not hold the theoretical position, this is called point defect. Point defects are of two types: Stoichiometric defects: Schottky defect: Due to missing of ions from lattice point in pairs. Frenkel defect: It is caused due to the creation of lattice vacancy as a r ...
Effects of Copper and Zinc Ions on Photosystem II Studied by EPR
Effects of Copper and Zinc Ions on Photosystem II Studied by EPR

... monitored by the Cu2+ EPR signal. A 200 K illumination of such a sample revealed a slightly altered EPR spectrum. The yield of signals observed increased to ∼1.2 spins/PS II, and there was a very slight shift in the g-value to a higher value. After a second EDTA wash, 200 K illumination induced 2 ra ...
equilibrium - eVirtualGuru
equilibrium - eVirtualGuru

... reactions also attain a state of equilibrium. These reactions can occur both in forward and backward directions. When the rates of the forward and reverse reactions become equal, the concentrations of the reactants and the products remain constant. This is the stage of chemical equilibrium. This equ ...
Chemical Reactions - 2012 Book Archive
Chemical Reactions - 2012 Book Archive

... antibiotics such as amoxicillin, were unknown only a few years ago. Their development required that chemists understand how substances combine in certain ratios and under specific conditions to produce a new substance with particular properties. ...
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Ion

An ion (/ˈaɪən, -ɒn/) is an atom or a molecule in which the total number of electrons is not equal to the total number of protons, giving the atom or molecule a net positive or negative electrical charge.Ions can be created, by either chemical or physical means, via ionization. In chemical terms, if a neutral atom loses one or more electrons, it has a net positive charge and is known as a cation. If an atom gains electrons, it has a net negative charge and is known as an anion. An ion consisting of a single atom is an atomic or monatomic ion; if it consists of two or more atoms, it is a molecular or polyatomic ion. Because of their electric charges, cations and anions attract each other and readily form ionic compounds, such as salts. In the case of physical ionization of a medium, such as a gas, what are known as ""ion pairs"" are created by ion impact, and each pair consists of a free electron and a positive ion.
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