111 Exam I F 04 use
... Tear off this top page (pg. 1)-It is your scratch paper The following are molar masses you may or may not need: H2O = 18.02 ...
... Tear off this top page (pg. 1)-It is your scratch paper The following are molar masses you may or may not need: H2O = 18.02 ...
Mongar Higher Secondary School
... The amount of substance containing particles equal to Avogadro’s number. iii) According to electronic concept, a process in which one or more electrons are lost. iv) The fundamental property used for classification of elements in the modern periodic table. v) A salt which is used in some kind of ‘ir ...
... The amount of substance containing particles equal to Avogadro’s number. iii) According to electronic concept, a process in which one or more electrons are lost. iv) The fundamental property used for classification of elements in the modern periodic table. v) A salt which is used in some kind of ‘ir ...
Chapter 2: Chemical Reactions Section 1
... Chemical Reactions Section 1: Observing Chemical Changes How can changes in matter be described? In terms of two kinds of propertiesphysical properties and chemical properties Changes in matter can be described in terms of physical or chemical changes ...
... Chemical Reactions Section 1: Observing Chemical Changes How can changes in matter be described? In terms of two kinds of propertiesphysical properties and chemical properties Changes in matter can be described in terms of physical or chemical changes ...
Notes on QA - Scarsdale Public Schools
... Qualitative analysis involves separating a mixture of cations based on their solubilities. In the traditional QA scheme, the Group 1 cations (not the periodic table group 1) are separated from a mixture of dozens of cations based on their insolubility as chloride salts. Hence the Group 1 cations con ...
... Qualitative analysis involves separating a mixture of cations based on their solubilities. In the traditional QA scheme, the Group 1 cations (not the periodic table group 1) are separated from a mixture of dozens of cations based on their insolubility as chloride salts. Hence the Group 1 cations con ...
Chemical Equation Reactions
... In the previous single replacement reaction example, we have written the molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually co ...
... In the previous single replacement reaction example, we have written the molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually co ...
AP CHEMISTRY - An Incomplete List of Topics
... Be able to predict properties using the periodic table in terms of number of valence electrons, number of shells(main energy levels) and net nuclear force(kernel charge). Metals in Groups IA, IIA, and IIIA will form ions that have charges of 1+, 2+, and 3+ respectively. These positive ions have only ...
... Be able to predict properties using the periodic table in terms of number of valence electrons, number of shells(main energy levels) and net nuclear force(kernel charge). Metals in Groups IA, IIA, and IIIA will form ions that have charges of 1+, 2+, and 3+ respectively. These positive ions have only ...
Chemical Reactions and Reaction Stoichiometry
... When a hydrocarbon is fully combusted, the mass of water and carbon dioxide collected can be used directly to determine the amount of carbon and hydrogen in the original compound. ...
... When a hydrocarbon is fully combusted, the mass of water and carbon dioxide collected can be used directly to determine the amount of carbon and hydrogen in the original compound. ...
PERIODIC TABLE
... 53- Which one of the following compounds is an alkane? a. C3H6 b. C3H4 c. C2H6 d. C2H4 e. C2H2 54- What is the generalized formula for an alkene? a. CnHn-2 b. C2nHn c. CnH2n d. CnHn+2 ...
... 53- Which one of the following compounds is an alkane? a. C3H6 b. C3H4 c. C2H6 d. C2H4 e. C2H2 54- What is the generalized formula for an alkene? a. CnHn-2 b. C2nHn c. CnH2n d. CnHn+2 ...
sample paper chemistry clas xi set 3
... 9. How many grams of NaOH should be dissolved to make 100 ml of 0.15 M NaOH solution? 10. (a.) why Rutherford’s model was discarded? (b.) write the electronic configuration of S211. The reaction of NH2 CN(s) with oxygen was affected in a bomb calorimeter and ∆U was found to be -742.7 Kj/mol of cyana ...
... 9. How many grams of NaOH should be dissolved to make 100 ml of 0.15 M NaOH solution? 10. (a.) why Rutherford’s model was discarded? (b.) write the electronic configuration of S211. The reaction of NH2 CN(s) with oxygen was affected in a bomb calorimeter and ∆U was found to be -742.7 Kj/mol of cyana ...
S.O.L. Review
... 9. If the temperature of a reaction is increased, the reaction proceeds at a much quicker rate because the – a. Activation energy increases b. Energy of the products increases c. Frequency of collisions between reactants increases d. Energy of the activated complex increases ...
... 9. If the temperature of a reaction is increased, the reaction proceeds at a much quicker rate because the – a. Activation energy increases b. Energy of the products increases c. Frequency of collisions between reactants increases d. Energy of the activated complex increases ...
writing chemical equations
... In the previous single replacement reaction example, we have written the molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually co ...
... In the previous single replacement reaction example, we have written the molecular equation for the reaction. Although this equation shows the reactants and products of the reaction, it does not give a very clear picture of what truly occurs in solution. In fact, such an aqueous solution actually co ...
Chemistry EOC Review
... 16) Although mercury commonly exists in 7 isotopes, an asteroid with only two specific isotopes is found: Hg-199 with a weight of 198.967g and Hg-200 with a weight of 199.968g. You find that 62.305% of the mercury is Hg-200 & 37.695% is Hg-199. (1) What is the average atomic mass of mercury on this ...
... 16) Although mercury commonly exists in 7 isotopes, an asteroid with only two specific isotopes is found: Hg-199 with a weight of 198.967g and Hg-200 with a weight of 199.968g. You find that 62.305% of the mercury is Hg-200 & 37.695% is Hg-199. (1) What is the average atomic mass of mercury on this ...
THERMOCHEMISTRY ENERGETICS/ENTHALPY
... Chemists generally refer to the energy given out when a fuel burns in kJmol-1 because this compares the same number of molecules of each fuel. For use as fuels it is sometimes better to convert the units from kJmol-1 to kJg-1 (OR the energy density) of a fuel ...
... Chemists generally refer to the energy given out when a fuel burns in kJmol-1 because this compares the same number of molecules of each fuel. For use as fuels it is sometimes better to convert the units from kJmol-1 to kJg-1 (OR the energy density) of a fuel ...
pdfInt 2 Homework Unit 2 1 MB
... Scientists have been experimenting to find ways of reducing carbon dioxide in the atmosphere. One of these ways involves placing concrete balls on the sea bed. They hope that green plants called algae will grow on the balls and this will help to reduce the carbon dioxide level. Give a reason why the ...
... Scientists have been experimenting to find ways of reducing carbon dioxide in the atmosphere. One of these ways involves placing concrete balls on the sea bed. They hope that green plants called algae will grow on the balls and this will help to reduce the carbon dioxide level. Give a reason why the ...
Soluble salts
... Redox reactions can often be identified by presence of an element in its elemental form on one side of the reaction arrow and as a part of a compound on the other side of the reaction arrow. In the example cited above, tin is in a compound on the reactant side and exists as the element on the produc ...
... Redox reactions can often be identified by presence of an element in its elemental form on one side of the reaction arrow and as a part of a compound on the other side of the reaction arrow. In the example cited above, tin is in a compound on the reactant side and exists as the element on the produc ...
Unit 6 Naming Binary Compounds
... their respective charges. (For polyatomic ions you are expected to know their charges and names.) 2. Add whatever subscripts are needed to balance the charges, or criss-cross. ...
... their respective charges. (For polyatomic ions you are expected to know their charges and names.) 2. Add whatever subscripts are needed to balance the charges, or criss-cross. ...
MCQ plus answers
... The following multiple choice questions are provided to illustrate the type of questions used in this section of the paper and to provide you with extra practice. It is not a sample quiz. The questions in the paper will be in the style of these questions but may well cover different topics. In the e ...
... The following multiple choice questions are provided to illustrate the type of questions used in this section of the paper and to provide you with extra practice. It is not a sample quiz. The questions in the paper will be in the style of these questions but may well cover different topics. In the e ...
Chemical reactions
... • A reaction that takes place when the ions of one compound interact with the ions of another compound forming – A solid precipitate – A gas ...
... • A reaction that takes place when the ions of one compound interact with the ions of another compound forming – A solid precipitate – A gas ...
Click Here To File
... As KCl dissociates completely, number of ions produced are 2. Therefore, van’t Hoff factor, i=2 Mass of KCl solution = 1000 × 1.04 = 1040 g Mass of solvent = 1040 – 74.5 = 965.5 g = 0.9655 kg Molar mass of KCl = 39+35.5 = 74.5 g mol-1 As KCl dissociates completely, number of ions produced are 2. The ...
... As KCl dissociates completely, number of ions produced are 2. Therefore, van’t Hoff factor, i=2 Mass of KCl solution = 1000 × 1.04 = 1040 g Mass of solvent = 1040 – 74.5 = 965.5 g = 0.9655 kg Molar mass of KCl = 39+35.5 = 74.5 g mol-1 As KCl dissociates completely, number of ions produced are 2. The ...
Review Packet
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
... b. mass c. volume d. stuff 32. A change in the force of Earth’s gravity on an object will affect its a. mass b. density c. weight d. kinetic energy 33. Chemical proprieties a. include changes of state of a substance b. include mass and color c. include changes that alter the identity of a substance ...
Making Connections - SCH4U1-CCVI
... In a chemical reaction, the PE of the reactants and products results in the transfer of energy from the: 1) surroundings to the chemical system (ENDO) 2) chemical system to the surroundings (EXO) Enthalpy changes and Spontaneity Bond energy (BE): the minimum energy required to break one mole of bo ...
... In a chemical reaction, the PE of the reactants and products results in the transfer of energy from the: 1) surroundings to the chemical system (ENDO) 2) chemical system to the surroundings (EXO) Enthalpy changes and Spontaneity Bond energy (BE): the minimum energy required to break one mole of bo ...
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.