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Word - chemmybear.com
... electrode (where K+ is attracted) and have it react with water to form H2 and OH-. K+ + e- K 2K° + 2H2O 2K+ + 2OH- + H2 The combination of these two reactions is exactly what happens when water is reduced at the cathode. 8. (Trick #2) When CuSO4(aq) is electrolyzed, you know that Cu° metal is go ...
... electrode (where K+ is attracted) and have it react with water to form H2 and OH-. K+ + e- K 2K° + 2H2O 2K+ + 2OH- + H2 The combination of these two reactions is exactly what happens when water is reduced at the cathode. 8. (Trick #2) When CuSO4(aq) is electrolyzed, you know that Cu° metal is go ...
Chemical Equilibrium Review Ch 13-14 2015
... 7. A gaseous mixture contains 0.30mol CO, 0.10mol H2, and 0.020mol H2O, plus an unknown amount of CH4, per liter. This mixture is at equilibrium at 1200.K. CO(g) + 3H2(g) CH4(g) + H2O(g) The equilibrium constant Kc = 3.92. What is the equilibrium concentration of CH4 in this mixture? 8. The reactio ...
... 7. A gaseous mixture contains 0.30mol CO, 0.10mol H2, and 0.020mol H2O, plus an unknown amount of CH4, per liter. This mixture is at equilibrium at 1200.K. CO(g) + 3H2(g) CH4(g) + H2O(g) The equilibrium constant Kc = 3.92. What is the equilibrium concentration of CH4 in this mixture? 8. The reactio ...
CAMBRIDGE INTERNATIONAL EXAMINATIONS
... 15 Rubidium is above sodium in the reactivity series. What is formed when concentrated aqueous rubidium chloride is electrolysed? ...
... 15 Rubidium is above sodium in the reactivity series. What is formed when concentrated aqueous rubidium chloride is electrolysed? ...
Extra Unit 3 Problems for the Web Site (Honors
... 22. Which of the following metals will not react with hydrochloric acid to release hydrogen gas? a) zinc b) magnesium c) silver d) tin 23. A compound is analyzed and found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. If the molecular mass of compound is 60.0 g/mol, what is the molecular ...
... 22. Which of the following metals will not react with hydrochloric acid to release hydrogen gas? a) zinc b) magnesium c) silver d) tin 23. A compound is analyzed and found to contain 40.0% carbon, 6.7% hydrogen, and 53.3% oxygen. If the molecular mass of compound is 60.0 g/mol, what is the molecular ...
Question paper - Edexcel
... 8 Which of these solid substances is likely to have the greatest standard entropy? Use of the data booklet is not required. A SnO B SnO2 C SnBr2 D SnBr4 (Total for Question 8 = 1 mark) 9 What is the correct name for the molecule shown below? H3C ...
... 8 Which of these solid substances is likely to have the greatest standard entropy? Use of the data booklet is not required. A SnO B SnO2 C SnBr2 D SnBr4 (Total for Question 8 = 1 mark) 9 What is the correct name for the molecule shown below? H3C ...
CVB101 – Lecture 3 Chemical Bonding • Chemical bonding
... Definition of redox reaction – a reaction in which electrons are transferred Half reactions are used to show electron transfer. Oxidation – loss of electrons Reduction – gain of electrons Common redox reactions Combination reactions – a reaction in which 2 or more substances combine to for ...
... Definition of redox reaction – a reaction in which electrons are transferred Half reactions are used to show electron transfer. Oxidation – loss of electrons Reduction – gain of electrons Common redox reactions Combination reactions – a reaction in which 2 or more substances combine to for ...
Reaction Rate Reading Packet
... 3. Surface area is the measure of how much area of an object is exposed. For the same mass, many small particles have a greater total surface area than one large particle. For example, steel wool has a larger surface area than a block of steel of the same mass. This allows oxygen molecules to collid ...
... 3. Surface area is the measure of how much area of an object is exposed. For the same mass, many small particles have a greater total surface area than one large particle. For example, steel wool has a larger surface area than a block of steel of the same mass. This allows oxygen molecules to collid ...
Hydrothermal Reactions from Sodium Hydrogen Carbonate to Phenol
... CO2 was also studied.13 The production of phenol from solid CO2 reduced by Fe3O4 in the supercritical state was reported,14 but such reaction conditions are rigorous. Moreover, in the case of supercritical CO2, the excessive water was considered to be unfavorable for the formation of phenol, which i ...
... CO2 was also studied.13 The production of phenol from solid CO2 reduced by Fe3O4 in the supercritical state was reported,14 but such reaction conditions are rigorous. Moreover, in the case of supercritical CO2, the excessive water was considered to be unfavorable for the formation of phenol, which i ...
Brønsted acid
... 6. The sum of the oxidation numbers of all the atoms in a molecule or ion is equal to the charge on the molecule or ion. 7. Oxidation numbers do not have to be integers. Oxidation number of oxygen in the superoxide ion, O2-, is –½. ...
... 6. The sum of the oxidation numbers of all the atoms in a molecule or ion is equal to the charge on the molecule or ion. 7. Oxidation numbers do not have to be integers. Oxidation number of oxygen in the superoxide ion, O2-, is –½. ...
Question paper - Edexcel
... Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from A to D and put a cross in the box . and then mark your new answer with If you change your mind, put a line through the box a cross . 1 Methods for inve ...
... Answer ALL the questions in this section. You should aim to spend no more than 20 minutes on this section. For each question, select one answer from A to D and put a cross in the box . and then mark your new answer with If you change your mind, put a line through the box a cross . 1 Methods for inve ...
Ch 8 Notes: Chemical Equations and Reactions
... compound is decomposed or breaks down; energy is a reactant and is written on the left of the arrow: 2H2O + energy 2H2 + O2 B. ...
... compound is decomposed or breaks down; energy is a reactant and is written on the left of the arrow: 2H2O + energy 2H2 + O2 B. ...
ChemicalBondingPowerpoint
... When the carboxyl group of one amino acid reacts with the amino group of another amino acid, a strong covalent bond called a peptide bond forms. Polypeptides are polymers made up of peptide-bonded amino acids. Small polypeptides are called oligopeptides, and large polypeptides are called proteins. Y ...
... When the carboxyl group of one amino acid reacts with the amino group of another amino acid, a strong covalent bond called a peptide bond forms. Polypeptides are polymers made up of peptide-bonded amino acids. Small polypeptides are called oligopeptides, and large polypeptides are called proteins. Y ...
CO 2(g) - cloudfront.net
... No, molecules still same Yes, food decomposing and combining Digestion of food with stomach acid Dissolving sugar in water No, molecules still same Burning of alcohol in a flambé dessert Yes, alcohol combining with O2 to make CO2 and H2O ...
... No, molecules still same Yes, food decomposing and combining Digestion of food with stomach acid Dissolving sugar in water No, molecules still same Burning of alcohol in a flambé dessert Yes, alcohol combining with O2 to make CO2 and H2O ...
CHEMISTRY-1 CHAPTER 8 CHEMICAL REACTIONS
... as a model 3. Balance it Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
... as a model 3. Balance it Don’t forget about the diatomic elements! (BrINClHOF) For example, Oxygen is O2 as an element. In a compound, it can’t be a diatomic element because it’s not an element anymore, it’s a compound! ...
In this experiment you will observe examples of the five basic types
... evaluation sheet, and answers (in complete sentences) to the following questions. 1. What are some of the observable changes that are evidence that a chemical reaction has taken place? 2. How did the flaming splint behave when it was inserted into the tube with CO2 (g)? In what way was this differen ...
... evaluation sheet, and answers (in complete sentences) to the following questions. 1. What are some of the observable changes that are evidence that a chemical reaction has taken place? 2. How did the flaming splint behave when it was inserted into the tube with CO2 (g)? In what way was this differen ...
C6_rev - boswellsrcd
... • Reactions in solution involve dissolved particles that must collide before reaction is possible. • The more crowded (concentrated) the solution, the faster the reaction because the frequency of successful collisions increases. ...
... • Reactions in solution involve dissolved particles that must collide before reaction is possible. • The more crowded (concentrated) the solution, the faster the reaction because the frequency of successful collisions increases. ...
Acids and Bases
... Most solutions of both acids and bases are clear and colourless. We need an indicator to tell them apart. An indicator is a chemical which changes colour as the concentration of H+ (aq) and OH- (aq) changes. Two common indicators are litmus and phenolpthalein ...
... Most solutions of both acids and bases are clear and colourless. We need an indicator to tell them apart. An indicator is a chemical which changes colour as the concentration of H+ (aq) and OH- (aq) changes. Two common indicators are litmus and phenolpthalein ...
Gas-Forming reactions Reactions that form a
... Oxidation-reduction reactions (Redox reactions) The reactions we have seen thus far are exchange reactions, in which the ions of the reactants changed partners. A+B¯ + C+D¯ → A+D¯ + C+B¯ But they end up with the same number of electrons they start with. Every atom, ion or polyatomic ion has a formal ...
... Oxidation-reduction reactions (Redox reactions) The reactions we have seen thus far are exchange reactions, in which the ions of the reactants changed partners. A+B¯ + C+D¯ → A+D¯ + C+B¯ But they end up with the same number of electrons they start with. Every atom, ion or polyatomic ion has a formal ...
Practice Test 1 (Chapters 1-7)
... 32. Which atomic particle determines the chemical a. Dry ice sublimes when left on the demo behavior of an atom? table in lecture. a. proton b. The light on a candle burns until a bell jar is b. electron placed over it for a period of time. c. neutron c. When a few drops of red food coloring are d. ...
... 32. Which atomic particle determines the chemical a. Dry ice sublimes when left on the demo behavior of an atom? table in lecture. a. proton b. The light on a candle burns until a bell jar is b. electron placed over it for a period of time. c. neutron c. When a few drops of red food coloring are d. ...
HL Multiple choice
... Which reaction has an enthalpy change equal to a standard enthalpy change of formation, ∆HfO? All reactions occur at 298 K and 1.01 × 105 Pa. A. ...
... Which reaction has an enthalpy change equal to a standard enthalpy change of formation, ∆HfO? All reactions occur at 298 K and 1.01 × 105 Pa. A. ...
Predicting Reactions • AP Chemistry CLASSIFYING REACTIONS
... 6. Be aware of disproportionation reactions. These are the reactions where the same chemical substance undergoes both oxidation and reduction. NO2 and H2O2 are classic examples: 3NO2(g) + H2O 2H+(aq) + 2NO3-(aq) + NO(g) 7. (Trick #1) During electrolysis of salts such as KI(aq), remember that K will ...
... 6. Be aware of disproportionation reactions. These are the reactions where the same chemical substance undergoes both oxidation and reduction. NO2 and H2O2 are classic examples: 3NO2(g) + H2O 2H+(aq) + 2NO3-(aq) + NO(g) 7. (Trick #1) During electrolysis of salts such as KI(aq), remember that K will ...
Outline
... 3. a very large number, but exactly what you need to go from amu to grams Chemical Equations A. Reactants and Products B. Balanced by atoms AND charge AND mass 1. Coefficients 2. implied “1” if nothing written a. like you to write it anyway for now 3. lowest whole number ratio C. How to balance 1. m ...
... 3. a very large number, but exactly what you need to go from amu to grams Chemical Equations A. Reactants and Products B. Balanced by atoms AND charge AND mass 1. Coefficients 2. implied “1” if nothing written a. like you to write it anyway for now 3. lowest whole number ratio C. How to balance 1. m ...
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.