g - nhscrazy4chem
... death in San Remo on 10 December 1896, and when it was disclosed that he had established a special peace prize, this immediately created a great international sensation. The name Nobel was connected with explosives and with inventions useful to the art of making war, but certainly not with questions ...
... death in San Remo on 10 December 1896, and when it was disclosed that he had established a special peace prize, this immediately created a great international sensation. The name Nobel was connected with explosives and with inventions useful to the art of making war, but certainly not with questions ...
Final Exam Practice Problems: R = 0.0821 Latm/molK NA = 6.022
... A) Li+ (aq) + SO42-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + Li+(aq) + NO3-(aq) B) Li+ (aq) + S-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + LiNO3(aq) C) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → Cu2+(aq) + S2-(aq) + 2 LiNO3(s) D) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq) ...
... A) Li+ (aq) + SO42-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + Li+(aq) + NO3-(aq) B) Li+ (aq) + S-(aq) + Cu+(aq) + NO3-(aq) → CuS(s) + LiNO3(aq) C) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → Cu2+(aq) + S2-(aq) + 2 LiNO3(s) D) 2 Li+(aq) + S2-(aq) + Cu2+(aq) + 2 NO3-(aq) → CuS(s) + 2 Li+(aq) + 2 NO3-(aq) ...
Scientific Measurement
... What is the freezing point of this substance? What is the boiling point of this substance? _____29. I can state the temperature at which water freezes in ˚C and K. _____30. I can state the temperature at which water melts in ˚C and K. _____31. I can state the temperature at which water boils in ˚C a ...
... What is the freezing point of this substance? What is the boiling point of this substance? _____29. I can state the temperature at which water freezes in ˚C and K. _____30. I can state the temperature at which water melts in ˚C and K. _____31. I can state the temperature at which water boils in ˚C a ...
31 BIOMOLECULES Y MODULE - 7
... pH or in temperature, the hydrogen bonds are disturbed and broken. When attractions between and within protein molecules are destroyed, the chains separate from each other, globules unfold and helices uncoil. We say that the protein has been denatured. Denaturation is seen in our daily life in many ...
... pH or in temperature, the hydrogen bonds are disturbed and broken. When attractions between and within protein molecules are destroyed, the chains separate from each other, globules unfold and helices uncoil. We say that the protein has been denatured. Denaturation is seen in our daily life in many ...
Chapter 4 Aqueous Reactions and Solution Stoichiometry
... HCl (aq) + NaOH (aq) NaCl (aq) + H2O (l) H+ (aq) + Cl- (aq) + Na+ (aq) + OH-(aq) Na+ (aq) + Cl- (aq) + H2O (l) H+ (aq) + OH- (aq) H2O (l) Aqueous Reactions © 2009, Prentice-Hall, Inc. ...
... HCl (aq) + NaOH (aq) NaCl (aq) + H2O (l) H+ (aq) + Cl- (aq) + Na+ (aq) + OH-(aq) Na+ (aq) + Cl- (aq) + H2O (l) H+ (aq) + OH- (aq) H2O (l) Aqueous Reactions © 2009, Prentice-Hall, Inc. ...
1. You should review balancing equations and identifying types of
... 1. You should review balancing equations and identifying types of reactions from the worksheets. In addition you should be able to write balanced chemical equations for reactions. Try to write, balance, and identify the types of the following reactions: a. the decomposition of ammonium nitrate to ni ...
... 1. You should review balancing equations and identifying types of reactions from the worksheets. In addition you should be able to write balanced chemical equations for reactions. Try to write, balance, and identify the types of the following reactions: a. the decomposition of ammonium nitrate to ni ...
pdfCfE Higher - Unit 3 - Pupil Booklet 2 MB
... the chemical industry involves the investment of large sums of money but employs relatively few people making it a capital intensive and not a labour intensive industry. ...
... the chemical industry involves the investment of large sums of money but employs relatively few people making it a capital intensive and not a labour intensive industry. ...
09_Lecture
... from the lungs. • This has the effect of drawing H3O+ from the bloodstream, making the blood more basic. • This condition is respiratory alkalosis. • This can easily be reversed by having the person breathe into a paper bag, which keeps some of the previously exhaled CO2 available for the next breat ...
... from the lungs. • This has the effect of drawing H3O+ from the bloodstream, making the blood more basic. • This condition is respiratory alkalosis. • This can easily be reversed by having the person breathe into a paper bag, which keeps some of the previously exhaled CO2 available for the next breat ...
Thermochemistry Thermodynamics is the study of energy and its
... Part 3. The heat of neutralization of HCl(aq) and NaOH(aq) Place 50.0 mL of 1.00 M HCl(aq) and the stir bar in the calorimeter, and 50.0 mL of 1.00 M NaOH(aq) in a graduated cylinder. Measure the temperature of the HCl and the NaOH with the thermometer. The two solutions should be at the same temper ...
... Part 3. The heat of neutralization of HCl(aq) and NaOH(aq) Place 50.0 mL of 1.00 M HCl(aq) and the stir bar in the calorimeter, and 50.0 mL of 1.00 M NaOH(aq) in a graduated cylinder. Measure the temperature of the HCl and the NaOH with the thermometer. The two solutions should be at the same temper ...
Kinetics of Oxidation of Benzyl Alcohol with Dilute Nitric Acid
... of recovered toluene. The vapor-phase catalytic oxidation of toluene results in a loss of carbon in the form of carbon oxides, in addition to lower conversion (10%20%) and poor selectivity (30%-50%). Although the liquid-phase oxidation of toluene prevents the carbon loss, it requires a homogeneous c ...
... of recovered toluene. The vapor-phase catalytic oxidation of toluene results in a loss of carbon in the form of carbon oxides, in addition to lower conversion (10%20%) and poor selectivity (30%-50%). Although the liquid-phase oxidation of toluene prevents the carbon loss, it requires a homogeneous c ...
Energetics - WordPress.com
... different bonds with different strengths are being broken and formed. The amount (or concentration) of reactants; the greater the amount that reacts , the greater the heat change. The states of the reactants and products – changing state involves an enthalpy change, and so will affect the total amou ...
... different bonds with different strengths are being broken and formed. The amount (or concentration) of reactants; the greater the amount that reacts , the greater the heat change. The states of the reactants and products – changing state involves an enthalpy change, and so will affect the total amou ...
Section 4.6: Double Displacement Reactions
... 7. Silver ions are the only metal ions that can be precipitated from a solution containing the C2H3O2− ions. Therefore, a solution such as NaC2H3O2(aq) can be used to precipitate silver ions from a mixture of dissolved metal ions. 8. Answers may vary. Sample answer: Most of the limescale that forms ...
... 7. Silver ions are the only metal ions that can be precipitated from a solution containing the C2H3O2− ions. Therefore, a solution such as NaC2H3O2(aq) can be used to precipitate silver ions from a mixture of dissolved metal ions. 8. Answers may vary. Sample answer: Most of the limescale that forms ...
Chemistry II Exams and Answer Keys 2015 Season
... If 2.0 mol of A are converted into products at a pressure of 1.25 atm and 1000.0°C, calculate the ΔE for the reaction? 1 liter × atm = 101.3 J A. 220 kJ B. −220 kJ C. 6.20 kJ D. −6.20 kJ 19. When elements with electron configuration 1s2 2s2 2p6 3s2 3p2 and 1s2 2s2 2p4 combine, they form a(n) _______ ...
... If 2.0 mol of A are converted into products at a pressure of 1.25 atm and 1000.0°C, calculate the ΔE for the reaction? 1 liter × atm = 101.3 J A. 220 kJ B. −220 kJ C. 6.20 kJ D. −6.20 kJ 19. When elements with electron configuration 1s2 2s2 2p6 3s2 3p2 and 1s2 2s2 2p4 combine, they form a(n) _______ ...
7.2 Balancing Equations
... three ways of describing a chemical reaction that are shown in the figure. In a small group, discuss possible advantages and disadvantages of each type of description. Think of possible reasons scientists use chemical equations more frequently than word equations. ...
... three ways of describing a chemical reaction that are shown in the figure. In a small group, discuss possible advantages and disadvantages of each type of description. Think of possible reasons scientists use chemical equations more frequently than word equations. ...
Measuring Rates
... gether with experimental studies about intermediate species, are critical in making judgments about the kinetic stability of a chemical system and in building hypotheses about reaction mechanisms. The analysis of kinetic data demands a basic understanding of the mathematical relationships between co ...
... gether with experimental studies about intermediate species, are critical in making judgments about the kinetic stability of a chemical system and in building hypotheses about reaction mechanisms. The analysis of kinetic data demands a basic understanding of the mathematical relationships between co ...
Chapter 12 Oxidation-Reduction Reactions
... The operational definition of oxidation is any reaction involving molecular oxygen. The theoretical definition of oxidation is the loss of electrons. The operational definition of reduction is the extracting of metals from metal ore. The theoretical definition of reduction is the gain of electrons. ...
... The operational definition of oxidation is any reaction involving molecular oxygen. The theoretical definition of oxidation is the loss of electrons. The operational definition of reduction is the extracting of metals from metal ore. The theoretical definition of reduction is the gain of electrons. ...
aq - Haverford Alchemy
... the ions that each contains. We then correlate these charged ionic species with the ones shown in the diagram. Solve: The diagram shows twice as many cations as anions, consistent with the formulation K 2SO4. Aqueous Check: Notice that the total net charge in the diagram is zero, as it must be if it ...
... the ions that each contains. We then correlate these charged ionic species with the ones shown in the diagram. Solve: The diagram shows twice as many cations as anions, consistent with the formulation K 2SO4. Aqueous Check: Notice that the total net charge in the diagram is zero, as it must be if it ...
Examination
... 70 Explain, in terms of the molecular polarity, why ethylene glycol dissolves in water to form a solution. [1] 71 Identify the percent by volume of ethylene glycol in a solution that freezes at ⫺10.°C. [1] 72 One engine-cooling system has a volume of 6400 mL. Determine the volume of ethylene glycol ...
... 70 Explain, in terms of the molecular polarity, why ethylene glycol dissolves in water to form a solution. [1] 71 Identify the percent by volume of ethylene glycol in a solution that freezes at ⫺10.°C. [1] 72 One engine-cooling system has a volume of 6400 mL. Determine the volume of ethylene glycol ...
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.