No Slide Title
... of heat is added to the gas under conditions of constant applied pressure. The final volume occupied by the gas is 6.000 L. What are q, w, and U for the process? From the first law, U = q + w. Heat is added to the system, so q = + 8000. J For constant pressure w = - p V = - (1.00 atm) (6.000 L – ...
... of heat is added to the gas under conditions of constant applied pressure. The final volume occupied by the gas is 6.000 L. What are q, w, and U for the process? From the first law, U = q + w. Heat is added to the system, so q = + 8000. J For constant pressure w = - p V = - (1.00 atm) (6.000 L – ...
Surface chemistry and Catalysis
... Kinetics makes this reaction nearly impossible (Requires a very high pressure and temperature over long time) ...
... Kinetics makes this reaction nearly impossible (Requires a very high pressure and temperature over long time) ...
CHAPTER-8 NCERT SOLUTIONS
... get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why? Answer: (a) In the manufacture of benzoic acid from toluene, alcoholic potassium permanganate is used as an oxidant because of the following reasons. (i) In a neutral medium, OH– ions ...
... get colourless pungent smelling gas HCl, but if the mixture contains bromide then we get red vapour of bromine. Why? Answer: (a) In the manufacture of benzoic acid from toluene, alcoholic potassium permanganate is used as an oxidant because of the following reasons. (i) In a neutral medium, OH– ions ...
ch17
... (a) In which direction will the reaction proceed to reach equilibrium? (b) If [CH4] = 5.56 M at equilibrium, what are the equilibrium concentrations of the other substances? PLAN: (a) To find the direction of reaction we determine the initial concentrations from the given amounts and volume, calcula ...
... (a) In which direction will the reaction proceed to reach equilibrium? (b) If [CH4] = 5.56 M at equilibrium, what are the equilibrium concentrations of the other substances? PLAN: (a) To find the direction of reaction we determine the initial concentrations from the given amounts and volume, calcula ...
U3 Student Workbook - The Connected Chemistry Curriculum
... reactions (combination, decomposition, single displacement, double displacement, and combustion reactions). In the Connecting Activity, students apply the Law of Conservation of Mass to chemical equations by learning how to balance them. Following a teacher demonstration of the simulation and proced ...
... reactions (combination, decomposition, single displacement, double displacement, and combustion reactions). In the Connecting Activity, students apply the Law of Conservation of Mass to chemical equations by learning how to balance them. Following a teacher demonstration of the simulation and proced ...
Exam 2
... SECTION B – Short answer questions Instructions for Section B Answer all questions in the spaces provided. To obtain full marks for your responses you should • give simpliÞed answers with an appropriate number of signiÞcant Þgures to all numerical questions; unsimpliÞed answers will not be given ful ...
... SECTION B – Short answer questions Instructions for Section B Answer all questions in the spaces provided. To obtain full marks for your responses you should • give simpliÞed answers with an appropriate number of signiÞcant Þgures to all numerical questions; unsimpliÞed answers will not be given ful ...
Worksheet
... Answer the following questions that relate to the analysis of chemical compounds. (a) A compound containing the elements C, H, N, and O is analyzed. When a 3.5560 g sample is burned in excess oxygen, 6.0838 g of CO2(g) is formed. (i) Determine the mass, in grams, of C in the 3.5560 g sample of the c ...
... Answer the following questions that relate to the analysis of chemical compounds. (a) A compound containing the elements C, H, N, and O is analyzed. When a 3.5560 g sample is burned in excess oxygen, 6.0838 g of CO2(g) is formed. (i) Determine the mass, in grams, of C in the 3.5560 g sample of the c ...
04 Reactions in Aqueous Solution
... • In the complete ionic equation all strong electrolytes (strong acids, strong bases, and soluble ionic salts) are dissociated into their ions. • This more accurately reflects the species that are found in the reaction mixture. Ag+(aq) + NO3−(aq) + K+(aq) + Cl−(aq) AgCl(s) + K+(aq) + NO3−(aq) ...
... • In the complete ionic equation all strong electrolytes (strong acids, strong bases, and soluble ionic salts) are dissociated into their ions. • This more accurately reflects the species that are found in the reaction mixture. Ag+(aq) + NO3−(aq) + K+(aq) + Cl−(aq) AgCl(s) + K+(aq) + NO3−(aq) ...
chapter 6: chemical reactions: an introduction
... equation. The substances formed in a reaction are called products and are shown on the right side of the equation. The same kinds of atoms must be present before and after a chemical reaction because atoms are neither created nor destroyed during a reaction. The same number of each kind of atom must ...
... equation. The substances formed in a reaction are called products and are shown on the right side of the equation. The same kinds of atoms must be present before and after a chemical reaction because atoms are neither created nor destroyed during a reaction. The same number of each kind of atom must ...
Final Exam Review 2010 UbD
... 16. What is the charge, location and mass of a proton? ___________________________________________ 17. What is the charge, location and mass of a neutron? __________________________________________ 18. What is the charge, location and mass of an electron? _________________________________________ 19 ...
... 16. What is the charge, location and mass of a proton? ___________________________________________ 17. What is the charge, location and mass of a neutron? __________________________________________ 18. What is the charge, location and mass of an electron? _________________________________________ 19 ...
Downloaded from www.studiestoday.com Downloaded from www
... Vapour phase refining : Vapour phase refining is the process of refining metal by converting it into its volatile compound and then, decomposing it to obtain a pure metal. The basic principle involved in this process are: (a) The metal should form a volatile compound with an available reagent, and ( ...
... Vapour phase refining : Vapour phase refining is the process of refining metal by converting it into its volatile compound and then, decomposing it to obtain a pure metal. The basic principle involved in this process are: (a) The metal should form a volatile compound with an available reagent, and ( ...
Class XII Chemistry IMPORTANT QUESTIONS and COMMON
... a) n-Type semiconductorWhen the impurity atoms contain more number of valence electrons than the parent insulator , they are called electron rich impurities. Negatively charged electrons are responsible for the conduction of electric current hence the name ‘n-Type semiconductor’. E .g .When traces o ...
... a) n-Type semiconductorWhen the impurity atoms contain more number of valence electrons than the parent insulator , they are called electron rich impurities. Negatively charged electrons are responsible for the conduction of electric current hence the name ‘n-Type semiconductor’. E .g .When traces o ...
Future perspectives in catalysis - NRSC
... It was also launched a quest to research and understand the underlying process. In 2007, the German scientist Gerhard Ertl was awarded the Nobel Prize for Chemistry for unraveling the mechanisms of the Haber-Bosch process. In the 1960s, he began using the equipment used in the burgeoning semiconduct ...
... It was also launched a quest to research and understand the underlying process. In 2007, the German scientist Gerhard Ertl was awarded the Nobel Prize for Chemistry for unraveling the mechanisms of the Haber-Bosch process. In the 1960s, he began using the equipment used in the burgeoning semiconduct ...
Boronic acids facilitate rapid oxime condensations at neutral pH
... materials. There are commercial libraries of phenylboronic acid and boronic ester compounds, many of which contain an aldehyde or can be trivially elaborated to incorporate one. Furthermore, the widespread use of oxime conjugations for connective processes at high concentration means that a variety ...
... materials. There are commercial libraries of phenylboronic acid and boronic ester compounds, many of which contain an aldehyde or can be trivially elaborated to incorporate one. Furthermore, the widespread use of oxime conjugations for connective processes at high concentration means that a variety ...
Advanced Higher Chemistry Resource Guide
... A similar experiment using zinc amalgam is also shown in a oneminute video produced by the Open University. Can also do similar experiment with oxidation states of Mn. ...
... A similar experiment using zinc amalgam is also shown in a oneminute video produced by the Open University. Can also do similar experiment with oxidation states of Mn. ...
Activation of Alcohols Toward Nucleophilic Substitution: Conversion
... This is known as the Lucas reagent. The use of aqueous hydrochloric acid, however, is less suitable because of the poor yield and the large amount of zinc chloride required. To overcome this difficulty, phase-transfer catalysts in a heterogeneous system have been used.5 Tertiary alcohols react readi ...
... This is known as the Lucas reagent. The use of aqueous hydrochloric acid, however, is less suitable because of the poor yield and the large amount of zinc chloride required. To overcome this difficulty, phase-transfer catalysts in a heterogeneous system have been used.5 Tertiary alcohols react readi ...
- Department of Chemistry, York University
... (NH2CH2COOH)H+ +CH3COOH(CH3CONHCH2COOH)H++H2O protonated N-acetyl-glycine (CH3CONHCH2COOH)H+ + NH2OH no (clusters) (NH2CH2CONHCH2COOH)H+ + H2O Fe+CH3CONHCH2COOH + NH2OH ? (too complicated) Fe+NH2CH2CONHCH2COOH + H2O diglycine, a dipeptide M+(Gly)n + CH3COOH + NH2OH M+(Gly)n+1 + H2O (M+ assemb ...
... (NH2CH2COOH)H+ +CH3COOH(CH3CONHCH2COOH)H++H2O protonated N-acetyl-glycine (CH3CONHCH2COOH)H+ + NH2OH no (clusters) (NH2CH2CONHCH2COOH)H+ + H2O Fe+CH3CONHCH2COOH + NH2OH ? (too complicated) Fe+NH2CH2CONHCH2COOH + H2O diglycine, a dipeptide M+(Gly)n + CH3COOH + NH2OH M+(Gly)n+1 + H2O (M+ assemb ...
Chapter 08
... There are two extremes in the spectrum of bonding: covalent bonds occur between atoms that share electrons ionic bonds occur between a metal and a nonmetal and involve ions Bonds that fall between these extremes are polar. In polar covalent bonds, electrons are shared but not shared equally. ...
... There are two extremes in the spectrum of bonding: covalent bonds occur between atoms that share electrons ionic bonds occur between a metal and a nonmetal and involve ions Bonds that fall between these extremes are polar. In polar covalent bonds, electrons are shared but not shared equally. ...
5073 Chemistry (SPA)
... particle of matter. It translates to mean something that is indivisible. In the eighteenth century, chemist, John Dalton, revived the term when he suggested that each element was made up of unique atoms and the atoms of an element are all the same. At that time, there were about 35 known elements. T ...
... particle of matter. It translates to mean something that is indivisible. In the eighteenth century, chemist, John Dalton, revived the term when he suggested that each element was made up of unique atoms and the atoms of an element are all the same. At that time, there were about 35 known elements. T ...
The masses of reactants and products are equal.
... The ashes left over from a wood fire contain less mass than the wood. In many other chemical reactions, mass also appears to decrease. That is, the mass of the products appears to be less than the mass of the reactants. In other reactions, the products appear to gain mass. For example, plants grow t ...
... The ashes left over from a wood fire contain less mass than the wood. In many other chemical reactions, mass also appears to decrease. That is, the mass of the products appears to be less than the mass of the reactants. In other reactions, the products appear to gain mass. For example, plants grow t ...
N5 Chemistry 2014
... The redox equation for the overall reaction is A H2O(ℓ) + SO32—(aq) + Fe3+(aq) SO42—(aq) + 2H+(aq) + Fe2+(aq) + e— B H2O(ℓ) + SO32—(aq) + 2Fe3+(aq) SO42—(aq) + 2H+(aq) + 2Fe2+(aq) C SO42—(aq) + 2H+(aq) + Fe2+(aq) + e— H2O(ℓ) + SO32—(aq) + Fe3+(aq) D SO42—(aq) + 2H+(aq) + 2Fe2+(aq) H2O(ℓ) + SO32—(aq) ...
... The redox equation for the overall reaction is A H2O(ℓ) + SO32—(aq) + Fe3+(aq) SO42—(aq) + 2H+(aq) + Fe2+(aq) + e— B H2O(ℓ) + SO32—(aq) + 2Fe3+(aq) SO42—(aq) + 2H+(aq) + 2Fe2+(aq) C SO42—(aq) + 2H+(aq) + Fe2+(aq) + e— H2O(ℓ) + SO32—(aq) + Fe3+(aq) D SO42—(aq) + 2H+(aq) + 2Fe2+(aq) H2O(ℓ) + SO32—(aq) ...
E:\My Documents\sch4u\SCH4U review McKay answers.wpd
... Q = [Ag+]2[CO32-] = (0.0005)2 x 2.95x10 -5 = 7.4 x 10 -12 Ksp = 8.5x10 -12 Q
... Q = [Ag+]2[CO32-] = (0.0005)2 x 2.95x10 -5 = 7.4 x 10 -12 Ksp = 8.5x10 -12 Q
Chemistry in Society - Cathkin High School
... Crude oil is a raw material from which naphtha is obtained by fractional distillation. Naphtha is a feedstock that can be cracked to produce ethene. Batch and Continuous Processes In a batch process the chemicals are loaded into the reaction vessel. The reaction is monitored and at the end of the re ...
... Crude oil is a raw material from which naphtha is obtained by fractional distillation. Naphtha is a feedstock that can be cracked to produce ethene. Batch and Continuous Processes In a batch process the chemicals are loaded into the reaction vessel. The reaction is monitored and at the end of the re ...
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.