Use the following answers for questions 10
... 15. The silver electrode is made larger. 16. The salt bridge is replaced by a platinum wire 17. Current is allowed to flow for 5 minutes ...
... 15. The silver electrode is made larger. 16. The salt bridge is replaced by a platinum wire 17. Current is allowed to flow for 5 minutes ...
Chapter 4 Notes
... completely dissociated into cations and anions. 3. Cancel the spectator ions on both sides of the ionic equation 4. Check that charges and number of atoms are balanced in the net ionic equation ...
... completely dissociated into cations and anions. 3. Cancel the spectator ions on both sides of the ionic equation 4. Check that charges and number of atoms are balanced in the net ionic equation ...
Porous silicon-based nanostructured microparticles as degradable
... Synthesis of 11-undecenylamine (Schematic 1 (2)): LiAlH4 (2.7 g, 71.1 mmol) was placed in a 250 mL round-bottom flask containing 50 mL of anhydrous THF, and the mixture was heated at reflux for 30 minutes under N2. Heating was stopped and a solution of 9-undecenamide (5.0 g, 27.3 mmol) in 100 mL of ...
... Synthesis of 11-undecenylamine (Schematic 1 (2)): LiAlH4 (2.7 g, 71.1 mmol) was placed in a 250 mL round-bottom flask containing 50 mL of anhydrous THF, and the mixture was heated at reflux for 30 minutes under N2. Heating was stopped and a solution of 9-undecenamide (5.0 g, 27.3 mmol) in 100 mL of ...
Revision IB2 Topic 1
... formula showing the numbers of atoms present in a compound formula showing the numbers of elements present in a compound formula showing the actual numbers of atoms of each element in a compound formula showing the simplest ratio of numbers of atoms of each element in a compound ...
... formula showing the numbers of atoms present in a compound formula showing the numbers of elements present in a compound formula showing the actual numbers of atoms of each element in a compound formula showing the simplest ratio of numbers of atoms of each element in a compound ...
Ch 17 Equilibrium Notes
... • The state where the concentrations of all reactants and products remain constant with them. • All reactions are reversible. • Forward and reverse rates are equal at equilibrium. • Any chemical reaction carried out in a close vessel reaches equilibrium. • On the molecular level, there is frantic ac ...
... • The state where the concentrations of all reactants and products remain constant with them. • All reactions are reversible. • Forward and reverse rates are equal at equilibrium. • Any chemical reaction carried out in a close vessel reaches equilibrium. • On the molecular level, there is frantic ac ...
PPTB&W - Gmu - George Mason University
... Nitrogen (N); Oxygen (O); Fluorine (F) Highly reactive, combining with nearly every element Ionic (salt like) hydrides Group 1A & 2A metals 2Li(s) + H2(g) 2LiH(s) Lithium Hydride Ca(s) + H2(g) CaH2(s) Calcium Hydride In H2O, H- is a strong base that pulls H+ from water Na+H-(s) + H2O Na+(a ...
... Nitrogen (N); Oxygen (O); Fluorine (F) Highly reactive, combining with nearly every element Ionic (salt like) hydrides Group 1A & 2A metals 2Li(s) + H2(g) 2LiH(s) Lithium Hydride Ca(s) + H2(g) CaH2(s) Calcium Hydride In H2O, H- is a strong base that pulls H+ from water Na+H-(s) + H2O Na+(a ...
Redox Introduction
... reaction in which ores were "reduced" from their oxides. – Iron oxide was "reduced" to iron by carbon monoxide. – Copper(II) oxide could be "reduced" to copper by hydrogen. ...
... reaction in which ores were "reduced" from their oxides. – Iron oxide was "reduced" to iron by carbon monoxide. – Copper(II) oxide could be "reduced" to copper by hydrogen. ...
File
... Copyright © 1984 by Educational Testing Service, Princeton, NJ 08541. All rights reserved. Reproductions of these examination questions by classroom teachers is permitted for face-to-face teaching purposes only. ...
... Copyright © 1984 by Educational Testing Service, Princeton, NJ 08541. All rights reserved. Reproductions of these examination questions by classroom teachers is permitted for face-to-face teaching purposes only. ...
Chemical Reactions and Equations - 2012 Book Archive
... two solid rocket boosters, which use a solid fuel mixture that contains mainly ammonium perchlorate and powdered aluminum. The chemical reaction between these substances produces aluminum oxide, water, nitrogen gas, and hydrogen chloride. Although the solid rocket boosters each have a significantly ...
... two solid rocket boosters, which use a solid fuel mixture that contains mainly ammonium perchlorate and powdered aluminum. The chemical reaction between these substances produces aluminum oxide, water, nitrogen gas, and hydrogen chloride. Although the solid rocket boosters each have a significantly ...
Chemistry 12 – Unit 3 – Chapter 5 – Thermochemistry
... When energy changes are measured in a chemical reaction, the system is the reaction mixture being studied, and the surroundings are the flask, the room, and the rest of the universe. The energy change is the difference between final and initial states (E = Efinal - Einitial). Any energy that flows ...
... When energy changes are measured in a chemical reaction, the system is the reaction mixture being studied, and the surroundings are the flask, the room, and the rest of the universe. The energy change is the difference between final and initial states (E = Efinal - Einitial). Any energy that flows ...
AP Chemistry - West Bloomfield School District
... 67. Acid-base neutralization reactions are very common in industrial processes. This is the reaction of sulfuric acid with sodium hydroxide: H2SO4 (aq) + 2 NaOH (aq) ...
... 67. Acid-base neutralization reactions are very common in industrial processes. This is the reaction of sulfuric acid with sodium hydroxide: H2SO4 (aq) + 2 NaOH (aq) ...
Document
... Pressure and Volume Reaction involves no change in the number moles of gas ◦ No effect on composition of equilibrium mixture For heterogenous equilibrium mixture ◦ Effect of pressure changes on solids and liquids can be ignored Volume is nearly independent of pressure Change in pressure due to ...
... Pressure and Volume Reaction involves no change in the number moles of gas ◦ No effect on composition of equilibrium mixture For heterogenous equilibrium mixture ◦ Effect of pressure changes on solids and liquids can be ignored Volume is nearly independent of pressure Change in pressure due to ...
Journal of Molecular Catalysis A, 302
... (∼0.05 mmol). 2-Trifluoromethylbenzoic acid was not formed using the Rh complex (entry 1) most likely as a consequence of steric inhibition by the CF3 group on the benzene ring interacting with the bulky Rh complex. A small quantity of the 2-trifluoromethylbenzoic acid was observed using the Pd comple ...
... (∼0.05 mmol). 2-Trifluoromethylbenzoic acid was not formed using the Rh complex (entry 1) most likely as a consequence of steric inhibition by the CF3 group on the benzene ring interacting with the bulky Rh complex. A small quantity of the 2-trifluoromethylbenzoic acid was observed using the Pd comple ...
5073 Chemistry IGCSE ordinary level for 2016
... 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 ...
PPT - George Mason University
... Aluminum Oxide, Al2O3, is amphoteric (can act as an acid or base) rather than basic like the Group 1A & 2A metals Although the other Group 3A elements are basically ionic they exhibit more Covalent character than similar 2A compounds. 3A cations are smaller with more charge density than 2A cations a ...
... Aluminum Oxide, Al2O3, is amphoteric (can act as an acid or base) rather than basic like the Group 1A & 2A metals Although the other Group 3A elements are basically ionic they exhibit more Covalent character than similar 2A compounds. 3A cations are smaller with more charge density than 2A cations a ...
Metals
... exist as an array of ions or atoms bound to each other but with no recognisable molecules. The formula NaCl instead tells us that throughout a sample of NaCl sodium and chlorine atoms are present in the ratio 1:1. Because ionic compounds do not contain molecules the sum of the relative atomic masses ...
... exist as an array of ions or atoms bound to each other but with no recognisable molecules. The formula NaCl instead tells us that throughout a sample of NaCl sodium and chlorine atoms are present in the ratio 1:1. Because ionic compounds do not contain molecules the sum of the relative atomic masses ...
2016 - Specimen Paper 4 - Cambridge International Examinations
... Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included ...
... Permission to reproduce items where third-party owned material protected by copyright is included has been sought and cleared where possible. Every reasonable effort has been made by the publisher (UCLES) to trace copyright holders, but if any items requiring clearance have unwittingly been included ...
Answer
... Under these conditions, calculate the energy per mole that is available from the splitting of ATP. With these concentrations, the reaction quotient, Q, is: ...
... Under these conditions, calculate the energy per mole that is available from the splitting of ATP. With these concentrations, the reaction quotient, Q, is: ...
Atomic Structure
... The mass of metal carbonate used was 1.00 g. Use this information, and your answer to part (c) (ii), to calculate the relative formula mass (Mr) of the metal carbonate. If you could not answer part (c) (ii), use 0.00943 as the number of moles of metal carbonate. This is not the answer to part (c) (i ...
... The mass of metal carbonate used was 1.00 g. Use this information, and your answer to part (c) (ii), to calculate the relative formula mass (Mr) of the metal carbonate. If you could not answer part (c) (ii), use 0.00943 as the number of moles of metal carbonate. This is not the answer to part (c) (i ...
Chemical Equilibrium
... Changing the volume of a reactant container changes the concentration of gaseous reactants and therefore their partial pressures Equilibrium position will therefore move The value of Kc or Kp does NOT change Changing pressure by adding more of an inert gas has no effect of the equilibrium position - ...
... Changing the volume of a reactant container changes the concentration of gaseous reactants and therefore their partial pressures Equilibrium position will therefore move The value of Kc or Kp does NOT change Changing pressure by adding more of an inert gas has no effect of the equilibrium position - ...
Chemistry Notes for the Whole Year Powerpoint
... (they can be either bonded or lone pair electrons). • Hydrogen and helium are exceptions to the octet rule. There is one more element that is an exception to the octet rule, which one is it? • Some elements (like sulfur) can have more than eight electrons around them, which means that they also brea ...
... (they can be either bonded or lone pair electrons). • Hydrogen and helium are exceptions to the octet rule. There is one more element that is an exception to the octet rule, which one is it? • Some elements (like sulfur) can have more than eight electrons around them, which means that they also brea ...
Part II - American Chemical Society
... DIRECTIONS TO THE EXAMINER - PART II Part II of this test requires that student answers be written in a response booklet with blank pages. Only this "Blue Book" is graded for a score on Part II. Testing materials, scratch paper, and the "Blue Book" should be made available to the student only during ...
... DIRECTIONS TO THE EXAMINER - PART II Part II of this test requires that student answers be written in a response booklet with blank pages. Only this "Blue Book" is graded for a score on Part II. Testing materials, scratch paper, and the "Blue Book" should be made available to the student only during ...
homework-11th-chem
... absorbed by the system from the surroundings, but work (w) is done on the system. What type of wall does the system have?(ii) No work is done on the system, but q amount of heat is taken out from the system and given to the surroundings. What type of wall does the system have?(iii) w amount of work ...
... absorbed by the system from the surroundings, but work (w) is done on the system. What type of wall does the system have?(ii) No work is done on the system, but q amount of heat is taken out from the system and given to the surroundings. What type of wall does the system have?(iii) w amount of work ...
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.