C1a - Mr Corfe
... calcium Ca magnesium Mg aluminium Al zinc Zn iron Fe Gold Au silver Ag RULE: An metal is more reactive if it is further to the left of the periodic table or further down in the group (not including groups 3-8) TYPES OF REACTIONS PHYSICAL – changing of states EXOTHERMIC – gives out heat EN ...
... calcium Ca magnesium Mg aluminium Al zinc Zn iron Fe Gold Au silver Ag RULE: An metal is more reactive if it is further to the left of the periodic table or further down in the group (not including groups 3-8) TYPES OF REACTIONS PHYSICAL – changing of states EXOTHERMIC – gives out heat EN ...
158KB - NZQA
... The added MnO2 acts as a catalyst and is added in small amounts because it is not used up in the reaction, so can be reused over and over again in the chemical reaction. ...
... The added MnO2 acts as a catalyst and is added in small amounts because it is not used up in the reaction, so can be reused over and over again in the chemical reaction. ...
KEY Final Exam Review - Iowa State University
... a. What is the rate law for the reaction? k[BF3][NH3] seen by exp 1&2;4&5 b. What is the overall order of the reaction? 2 c. Calculate the Rate constant with proper units. Using exp 1 k=(0.2130)M/s/(0.250M)(0.250M)=3.41M-1s-1 could use any of the five to calculate this. kave=3.408M-1s-1 d. What is t ...
... a. What is the rate law for the reaction? k[BF3][NH3] seen by exp 1&2;4&5 b. What is the overall order of the reaction? 2 c. Calculate the Rate constant with proper units. Using exp 1 k=(0.2130)M/s/(0.250M)(0.250M)=3.41M-1s-1 could use any of the five to calculate this. kave=3.408M-1s-1 d. What is t ...
Ch. 7 & 8 Notes (Chemical Reactions) teacher
... Example of a Balanced Chemical Equation: 2H2 (g) + O2 (g) 2H2O (g) Review: Reactants are on the ______ left side of the arrow, and the ...
... Example of a Balanced Chemical Equation: 2H2 (g) + O2 (g) 2H2O (g) Review: Reactants are on the ______ left side of the arrow, and the ...
Chem 1A Final Exam – Fall 2005
... polar or not. (20 pts) geometry Lewis structure around each each central atom chemical formula (include bond angles) central atom? hybridization? polar? CO32- ...
... polar or not. (20 pts) geometry Lewis structure around each each central atom chemical formula (include bond angles) central atom? hybridization? polar? CO32- ...
Regents Review Packet B2 Answer Key
... elements are listed in the table below. A student's experimental result indicates that the density of element Q is , at room temperature and standard pressure. ...
... elements are listed in the table below. A student's experimental result indicates that the density of element Q is , at room temperature and standard pressure. ...
Classifying Chemical Reactions 9-3
... Balance the atoms of an element one at a time by adding coefficients (the numbers in front) - save H and O until LAST! Check to make sure it is balanced. ...
... Balance the atoms of an element one at a time by adding coefficients (the numbers in front) - save H and O until LAST! Check to make sure it is balanced. ...
Export To Word
... B. Electrons are key to defining chemical and some physical properties, reactivity, and molecular structures. Repeating (periodic) patterns of physical and chemical properties occur among elements that define groups of elements with similar properties. The periodic table displays the repeating patte ...
... B. Electrons are key to defining chemical and some physical properties, reactivity, and molecular structures. Repeating (periodic) patterns of physical and chemical properties occur among elements that define groups of elements with similar properties. The periodic table displays the repeating patte ...
Oxidation-Reduction Reactions
... According to Max Planck, when solids are heated, they emit electromagnetic radiation over a wide range of wavelengths. He proposed that an atom could emit or absorb energy only in discrete quantities, like small packages, and quantum is the smallest quantity of that energy for electromagnetic radiat ...
... According to Max Planck, when solids are heated, they emit electromagnetic radiation over a wide range of wavelengths. He proposed that an atom could emit or absorb energy only in discrete quantities, like small packages, and quantum is the smallest quantity of that energy for electromagnetic radiat ...
Chemistry 11 - Sardis Secondary
... 5. Complete the following calculations. Include all units and don’t forget about sig figs. a) 1.0068g + 2.15g + 8.3g = b) 21.05cm – 12.1cm = c) 1.50 x 10-2 mol = ...
... 5. Complete the following calculations. Include all units and don’t forget about sig figs. a) 1.0068g + 2.15g + 8.3g = b) 21.05cm – 12.1cm = c) 1.50 x 10-2 mol = ...
2 - DrChoChemistryWebSite
... Reactants must be an element and a compound. Products will be a different element and a different compound. Na + KCl K + NaCl (Cations switched) F2 + LiCl LiF + Cl2 (Anions switched) ...
... Reactants must be an element and a compound. Products will be a different element and a different compound. Na + KCl K + NaCl (Cations switched) F2 + LiCl LiF + Cl2 (Anions switched) ...
Chapter 11 Chemical Reactions
... If the combustion is complete, the products will be CO2 and H2O. If the combustion is incomplete, the products will be CO (or possibly just C) and H2O. ...
... If the combustion is complete, the products will be CO2 and H2O. If the combustion is incomplete, the products will be CO (or possibly just C) and H2O. ...
Chemical Reactions
... The limiting reactant is the reactant that determines the maximum amount of product that is formed. The limiting reactant will be completely used up in a reaction. This makes the reaction stop. The other reactant will have some unchanged so it is said to be the excess reactant. For example, if you n ...
... The limiting reactant is the reactant that determines the maximum amount of product that is formed. The limiting reactant will be completely used up in a reaction. This makes the reaction stop. The other reactant will have some unchanged so it is said to be the excess reactant. For example, if you n ...
Class: 11 Subject: Chemistry Topic: Equilibrium No. of
... 16. The equilibrium N2 + O2 ƒ 2NO is established in a reaction vessel of 2.5 litres capacity. The amounts of nitrogen and oxygen taken at the start were 2 moles and 4 moles respectively. Half a mole of nitrogen has been used up a equilibrium. The molar concentration of nitric oxide is A. 0.2 B. 0.4 ...
... 16. The equilibrium N2 + O2 ƒ 2NO is established in a reaction vessel of 2.5 litres capacity. The amounts of nitrogen and oxygen taken at the start were 2 moles and 4 moles respectively. Half a mole of nitrogen has been used up a equilibrium. The molar concentration of nitric oxide is A. 0.2 B. 0.4 ...
exam review - hrsbstaff.ednet.ns.ca
... 17. Calculate the equilibrium constant Kc at 25 oC for the reaction 2 NOCl(g) ↔ 2 NO(g) + Cl2(g) using the following information. In one experiment 2.00 mol of NOCl is placed in a 1.00 -L flask, and the concentration of NO after equilibrium is achieved is 0.66 mol/L. 18. For the gas phase reaction H ...
... 17. Calculate the equilibrium constant Kc at 25 oC for the reaction 2 NOCl(g) ↔ 2 NO(g) + Cl2(g) using the following information. In one experiment 2.00 mol of NOCl is placed in a 1.00 -L flask, and the concentration of NO after equilibrium is achieved is 0.66 mol/L. 18. For the gas phase reaction H ...
semester two final review key units 5 and 6 only
... 2. Know the chemical formulas for the five common acids (ex. Nitric, phosphoric, etc.) Acetic acid CH3COOH, Hydrochloric acid HCl, Nitric acid HNO3, Sulfuric acid H2SO4 Phosphoric acid H3PO4 3. What are three characteristics of acids? What are three characteristics of bases? Acids are sour, corrosiv ...
... 2. Know the chemical formulas for the five common acids (ex. Nitric, phosphoric, etc.) Acetic acid CH3COOH, Hydrochloric acid HCl, Nitric acid HNO3, Sulfuric acid H2SO4 Phosphoric acid H3PO4 3. What are three characteristics of acids? What are three characteristics of bases? Acids are sour, corrosiv ...
The five main types of redox reactions are combination
... laptop batteries, is largely based on redox reactions. Redox (reductionoxidation) reactions are those in which the oxidation states of the reactants change. This occurs because in such reactions, electrons are always transferred between species. Redox reactions take place through either a simple pr ...
... laptop batteries, is largely based on redox reactions. Redox (reductionoxidation) reactions are those in which the oxidation states of the reactants change. This occurs because in such reactions, electrons are always transferred between species. Redox reactions take place through either a simple pr ...
PowerPoint for Cornell Notes
... or a bee? Bee stings are acidic in nature, which is why a household remedy for a bee sting is baking soda or sodium bicarbonate, which is a basic substance. A wasp sting, on the other hand, is mildly basic, so a household remedy for this will be vinegar, also known as acetic acid. These simple treat ...
... or a bee? Bee stings are acidic in nature, which is why a household remedy for a bee sting is baking soda or sodium bicarbonate, which is a basic substance. A wasp sting, on the other hand, is mildly basic, so a household remedy for this will be vinegar, also known as acetic acid. These simple treat ...
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.