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Review Packet
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
CHE 145-381 – TEST #2 SPRING 2009 CHAPTERS 6, 7, 8 NAME
... CHE 145-381 – TEST #2 SPRING 2009 CHAPTERS 6, 7, 8 NAME :________________________ DATE: ____________________________ You may use the Periodic Table. Please note that all quantities needed for the successful completion of this test have been given. Feel free to ask questions for clarification. 1. Ind ...
... CHE 145-381 – TEST #2 SPRING 2009 CHAPTERS 6, 7, 8 NAME :________________________ DATE: ____________________________ You may use the Periodic Table. Please note that all quantities needed for the successful completion of this test have been given. Feel free to ask questions for clarification. 1. Ind ...
Packet
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
IE EA
... d) SiCl4 Acidic; silicon can expand its valence shell and bind a variety of bases including chloride or pyridine. e) PF3 Basic; however, because of the very electronegative fluorine substituents this molecule is only a weak base toward protons but it is a strong ligand toward low-valent metals. f) S ...
... d) SiCl4 Acidic; silicon can expand its valence shell and bind a variety of bases including chloride or pyridine. e) PF3 Basic; however, because of the very electronegative fluorine substituents this molecule is only a weak base toward protons but it is a strong ligand toward low-valent metals. f) S ...
File - IGCSE STUDY BANK
... By using the same flask and paper X you can obtain a relative measure of the speed of the reaction in forming the same amount of sulphur. The speed or rate of reaction can expressed as 'x amount of sulphur'/time, so the rate is proportional to 1/time for a given set o You can investigate the effects ...
... By using the same flask and paper X you can obtain a relative measure of the speed of the reaction in forming the same amount of sulphur. The speed or rate of reaction can expressed as 'x amount of sulphur'/time, so the rate is proportional to 1/time for a given set o You can investigate the effects ...
FINAL EXAM Spring 2012
... at 25oC] 1) The reaction has the rate law, Rate = k[A][B]2. Which will cause the rate to increase the most? A) doubling [A] B) doubling [B] C) tripling [B] D) quadrupling [A] E) doubling both [A] and [B] 2) At a given temperature, a first-order reaction has a rate constant of 2.5 x 10-3 s-1. The tim ...
... at 25oC] 1) The reaction has the rate law, Rate = k[A][B]2. Which will cause the rate to increase the most? A) doubling [A] B) doubling [B] C) tripling [B] D) quadrupling [A] E) doubling both [A] and [B] 2) At a given temperature, a first-order reaction has a rate constant of 2.5 x 10-3 s-1. The tim ...
Chemical Reactions
... Oxidation – A loss of electrons during a chemical reaction Reduction – a gain of electrons during a chemical reaction 2 Ca + O2 → 2 CaO Calcium is oxidized Oxygen is reduced ...
... Oxidation – A loss of electrons during a chemical reaction Reduction – a gain of electrons during a chemical reaction 2 Ca + O2 → 2 CaO Calcium is oxidized Oxygen is reduced ...
Chapter 14 Chemical Reactions
... chemical formula in a chemical equation. When a coefficient is added in front of a chemical formula, all atoms in that formula are multiplied by that number. Use common denominators to help choose coefficients to try. ...
... chemical formula in a chemical equation. When a coefficient is added in front of a chemical formula, all atoms in that formula are multiplied by that number. Use common denominators to help choose coefficients to try. ...
Theoretical Calculation of Enthalpy of reactions involved in PZ
... Temperature dependency of theoretical equilibrium constants for reactions 1-4 calculated in this work are used to calculate the enthalpies of the corresponding reactions. Enthalpy of each of the reactions is calculated by correlating ln K to equation 5 and will be given in full paper. Deprotonation ...
... Temperature dependency of theoretical equilibrium constants for reactions 1-4 calculated in this work are used to calculate the enthalpies of the corresponding reactions. Enthalpy of each of the reactions is calculated by correlating ln K to equation 5 and will be given in full paper. Deprotonation ...
Slide 1
... • Sodium metal is composed of sodium atoms, each of which has a net charge of zero. (The positive charges of the 11 protons in its nucleus are exactly balanced by the negative charges on the 11 electrons.) Similarly, the chlorine molecule consists of 2 uncharged chlorine atoms (each has 17 protons ...
... • Sodium metal is composed of sodium atoms, each of which has a net charge of zero. (The positive charges of the 11 protons in its nucleus are exactly balanced by the negative charges on the 11 electrons.) Similarly, the chlorine molecule consists of 2 uncharged chlorine atoms (each has 17 protons ...
File
... “Exothermic” means that heat is released during the reaction. This often results in the reaction container feeling warm to the touch (heat is given off). Reactants Products + HEAT (heat on product side because released) “Endothermic” means that heat is absorbed during the reaction. This often resu ...
... “Exothermic” means that heat is released during the reaction. This often results in the reaction container feeling warm to the touch (heat is given off). Reactants Products + HEAT (heat on product side because released) “Endothermic” means that heat is absorbed during the reaction. This often resu ...
Chapter 4
... concentration until the chemical reaction between the two solutions is complete. Equivalence point – the point at which the reaction is complete Indicator – substance that changes color at (or near) the ...
... concentration until the chemical reaction between the two solutions is complete. Equivalence point – the point at which the reaction is complete Indicator – substance that changes color at (or near) the ...
普通化学 (全英文) 教学大纲
... 5.Acids and Bases (Chapter 15, 16.1—16.4) 5.1.The Bronsted-Lowry definitions (— H+, OH- transfer) (a).Strong acid (base) and Weak acid (base) (b).Conjugated acid-base pair Note in each acid-base reactions, there are two conjugated acid-base pairs (c).Poly-protic acid (base), and amphoteric substa ...
... 5.Acids and Bases (Chapter 15, 16.1—16.4) 5.1.The Bronsted-Lowry definitions (— H+, OH- transfer) (a).Strong acid (base) and Weak acid (base) (b).Conjugated acid-base pair Note in each acid-base reactions, there are two conjugated acid-base pairs (c).Poly-protic acid (base), and amphoteric substa ...
CHM134 General Chemistry I Semester Review – Dr. Steel This list
... 21. If n = 3, what are the allowed quantum numbers for l? 22. What element has the ground state electron configuration: [Ar]4s13d5? 23. What element has the ground state electron configuration: [Kr]5s2? 24. What is the maximum number of electrons permitted in a d sublevel? 25. Green light has a wave ...
... 21. If n = 3, what are the allowed quantum numbers for l? 22. What element has the ground state electron configuration: [Ar]4s13d5? 23. What element has the ground state electron configuration: [Kr]5s2? 24. What is the maximum number of electrons permitted in a d sublevel? 25. Green light has a wave ...
Dr. Baxley`s Thermodynamics Worksheet
... b. Using ∆G°f, I get −1226 kJ. Using ∆H°f and S°f, then ∆G° = ∆H°–T∆S°, I get –1227 kJ 6. Since formation of a bond has − ∆H° and − ∆S°, breaking of bonds has + ∆H° and + ∆S°. Putting this into the equation ∆G° = ∆H° − T∆S°, you get sign of ∆G° = (+) − [T(+)]. When temperatures are low, the product ...
... b. Using ∆G°f, I get −1226 kJ. Using ∆H°f and S°f, then ∆G° = ∆H°–T∆S°, I get –1227 kJ 6. Since formation of a bond has − ∆H° and − ∆S°, breaking of bonds has + ∆H° and + ∆S°. Putting this into the equation ∆G° = ∆H° − T∆S°, you get sign of ∆G° = (+) − [T(+)]. When temperatures are low, the product ...
SAMPLE PAPER Class - XII SUBJECT
... Q.11. Calculate the freezing point of one molar aq. solution(density 1.04gcm-3)of KCl. [Kf for water =1.86Kkgmol-1,At.Mass K=39,Cl=35.5] Q.12. A element crystallizes in a simple cubic structure. Calculate the unit cell edge length when its density 8 gm/cm3 if 200 gm of this element contains 24 x 102 ...
... Q.11. Calculate the freezing point of one molar aq. solution(density 1.04gcm-3)of KCl. [Kf for water =1.86Kkgmol-1,At.Mass K=39,Cl=35.5] Q.12. A element crystallizes in a simple cubic structure. Calculate the unit cell edge length when its density 8 gm/cm3 if 200 gm of this element contains 24 x 102 ...
Kinetics of a Reaction
... Enduring Understandings and Essential Knowledge ll matter is made of atoms. There are a limited number of types of atoms; these are the elements. A (Enduring Understanding 1A) 1A3: The mole is the fundamental unit for counting numbers of particles on the macroscopic level and allows quantitative ...
... Enduring Understandings and Essential Knowledge ll matter is made of atoms. There are a limited number of types of atoms; these are the elements. A (Enduring Understanding 1A) 1A3: The mole is the fundamental unit for counting numbers of particles on the macroscopic level and allows quantitative ...
PREP Chemistry 2008 Final Exam Review Problems
... b. Solid aluminum metal reacts with aqueous zinc chloride to produce solid zinc metal and aqueous aluminum chloride. c. Aqueous aluminum sulfate reacts with aqueous barium hydroxide to produce aluminum hydroxide and barium sulfate. Use solubility rules to determine states of products. d. Propane (C3 ...
... b. Solid aluminum metal reacts with aqueous zinc chloride to produce solid zinc metal and aqueous aluminum chloride. c. Aqueous aluminum sulfate reacts with aqueous barium hydroxide to produce aluminum hydroxide and barium sulfate. Use solubility rules to determine states of products. d. Propane (C3 ...
Reaction Rates
... the amount of reactant present at the start of the reaction the speed of the reaction the amount of product produced from the reaction How concentrated the reactants are ...
... the amount of reactant present at the start of the reaction the speed of the reaction the amount of product produced from the reaction How concentrated the reactants are ...
Make Your Own Summary 1. single displacement reaction 2
... It should be kept away from oxidizers, acids, sodium hydroxide, halogens, silver compounds, copper, iron, and calcium. It is labelled with a toxic (skull and crossbones) symbol. Safety precautions include using it in a ventilated area, wearing safety equipment, and avoiding use with listed substance ...
... It should be kept away from oxidizers, acids, sodium hydroxide, halogens, silver compounds, copper, iron, and calcium. It is labelled with a toxic (skull and crossbones) symbol. Safety precautions include using it in a ventilated area, wearing safety equipment, and avoiding use with listed substance ...
ppt
... Use the following thermochemical equation to calculate the molar heat of combustion of hexane. 2C6H14 (l) + 19O2 (g) 12CO2 (g) + 14H2O (g) + 7086kJ ...
... Use the following thermochemical equation to calculate the molar heat of combustion of hexane. 2C6H14 (l) + 19O2 (g) 12CO2 (g) + 14H2O (g) + 7086kJ ...
Chapter 4
... • What volume of a 0.100 M HCl solution is needed to neutralize 25.0 mL of 0.350 M NaOH? Write out reaction: HCl + NaOH --> NaCl + H2O 0.250L X 0.350mol NaOH X 1mol HCl X __1L HCl_ ...
... • What volume of a 0.100 M HCl solution is needed to neutralize 25.0 mL of 0.350 M NaOH? Write out reaction: HCl + NaOH --> NaCl + H2O 0.250L X 0.350mol NaOH X 1mol HCl X __1L HCl_ ...
Lewis acid catalysis
In Lewis acid catalysis of organic reactions, a metal-based Lewis acid acts as an electron pair acceptor to increase the reactivity of a substrate. Common Lewis acid catalysts are based on main group metals such as aluminum, boron, silicon, and tin, as well as many early (titanium, zirconium) and late (iron, copper, zinc) d-block metals. The metal atom forms an adduct with a lone-pair bearing electronegative atom in the substrate, such as oxygen (both sp2 or sp3), nitrogen, sulfur, and halogens. The complexation has partial charge-transfer character and makes the lone-pair donor effectively more electronegative, activating the substrate toward nucleophilic attack, heterolytic bond cleavage, or cycloaddition with 1,3-dienes and 1,3-dipoles.Many classical reactions involving carbon–carbon or carbon–heteroatom bond formation can be catalyzed by Lewis acids. Examples include the Friedel-Crafts reaction, the aldol reaction, and various pericyclic processes that proceed slowly at room temperature, such as the Diels-Alder reaction and the ene reaction. In addition to accelerating the reactions, Lewis acid catalysts are able to impose regioselectivity and stereoselectivity in many cases.Early developments in Lewis acid reagents focused on easily available compounds such as TiCl4, BF3, SnCl4, and AlCl3. The relative strengths of these (and other) Lewis acids may be estimated from NMR spectroscopy by the Childs method or the Gutmann-Beckett method. Over the years, versatile catalysts bearing ligands designed for specific applications have facilitated improvement in both reactivity and selectivity of Lewis acid-catalyzed reactions. More recently, Lewis acid catalysts with chiral ligands have become an important class of tools for asymmetric catalysis.Challenges in the development of Lewis acid catalysis include inefficient catalyst turnover (caused by catalyst affinity for the product) and the frequent requirement of two-point binding for stereoselectivity, which often necessitates the use of auxiliary groups.