Sample 112 Final
... The intermolecular forces(s) responsible for CH4’s having the lowest boiling point in the set CH4, SiH4, GeH4, SnS4 is/are a) hydrogen bonding b) dipole-dipole interactions c) London-dispersion forces d) mainly hydrogen bonding but also dipole-dipole interactions e) mainly London-dispersion forces b ...
... The intermolecular forces(s) responsible for CH4’s having the lowest boiling point in the set CH4, SiH4, GeH4, SnS4 is/are a) hydrogen bonding b) dipole-dipole interactions c) London-dispersion forces d) mainly hydrogen bonding but also dipole-dipole interactions e) mainly London-dispersion forces b ...
Exam 2 Review - Iowa State University
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
... 1. Oxidation number of an element in its elementary or uncombined state is 0. 2. In an ionic compound, the oxidation number of a monatomic ion is the same as its charge. 3. Certain elements almost always have the same oxidation number. a. Group 1A elements = +1 b. Group 2A elements = +2 c. Group 3A ...
Chemistry IGCSE Revision PDF File
... Sodium chloride NaCl is a ____________. There are __________ bonds between the two the same/ different numbers of electrons. elements _________ and _________. When these atoms bond one ____________ from the • Isotopes are atoms of the same element with ___________ atom is donated to the ____________ ...
... Sodium chloride NaCl is a ____________. There are __________ bonds between the two the same/ different numbers of electrons. elements _________ and _________. When these atoms bond one ____________ from the • Isotopes are atoms of the same element with ___________ atom is donated to the ____________ ...
Answers to Final Exam Review
... Sodium because they are in the same group; elements in the same group have similar properties 28. Which pair of elements is both brittle and not able to conduct heat? a. Bromine and silver c. Iron and bromine d. Silver and iron b. Iodine and neon 29. An atom of which element has the weakest attracti ...
... Sodium because they are in the same group; elements in the same group have similar properties 28. Which pair of elements is both brittle and not able to conduct heat? a. Bromine and silver c. Iron and bromine d. Silver and iron b. Iodine and neon 29. An atom of which element has the weakest attracti ...
Ionic Equations
... sodium hydroxide and calcium bromide to give calcium hydroxide and sodium bromide ...
... sodium hydroxide and calcium bromide to give calcium hydroxide and sodium bromide ...
(1) Identify all the species
... In a decomposition reaction a compound is broken into smaller chemical species. AB → A + B The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction: 2 H2O → 2 H2 + O2 ...
... In a decomposition reaction a compound is broken into smaller chemical species. AB → A + B The electrolysis of water into oxygen and hydrogen gas is an example of a decomposition reaction: 2 H2O → 2 H2 + O2 ...
Definitions - Loreto Science
... • increase across the periods in the Periodic Table for two reasons: • increasing nuclear charge • decreasing atomic radius F= most electronegative element. Halogens –decrease in reducing power down the group due to drop in electroneg. values. AG ...
... • increase across the periods in the Periodic Table for two reasons: • increasing nuclear charge • decreasing atomic radius F= most electronegative element. Halogens –decrease in reducing power down the group due to drop in electroneg. values. AG ...
Name: Northwest Vista College Chem 1311
... 33. The elements in Group 2A are known by what name? A) transition metals B) halogens C) alkali metals D) alkaline earth metals E) noble gases 34. Which one of the following elements is a transition element? A) antimony B) barium C) chromium D) potassium E) selenium 35. According to the zeroth law o ...
... 33. The elements in Group 2A are known by what name? A) transition metals B) halogens C) alkali metals D) alkaline earth metals E) noble gases 34. Which one of the following elements is a transition element? A) antimony B) barium C) chromium D) potassium E) selenium 35. According to the zeroth law o ...
1.0 basic concepts
... number of moles of reactants à products. • A rule of thumb to help you balance is to balance the elements in this order - MACHO: ...
... number of moles of reactants à products. • A rule of thumb to help you balance is to balance the elements in this order - MACHO: ...
AP Chemistry Summer Assignment 2016
... Predict whether the following combinations will result in a reaction. Write a balanced reaction for those reactions. Indicate you understand the specific reactions by writing the net ionic equation for the reaction. Hopefully you would have memorized the solubility rules before attempting to answer ...
... Predict whether the following combinations will result in a reaction. Write a balanced reaction for those reactions. Indicate you understand the specific reactions by writing the net ionic equation for the reaction. Hopefully you would have memorized the solubility rules before attempting to answer ...
Worksheet 8 Notes - Department of Chemistry | Oregon State
... What is a Lewis base? What is a Lewis acid? Let me start by stating that we are familiar with many bases and acids. Those we know to be bases are Lewis bases and those we know to be acids are Lewis acids. Our previous ideas of bases and acids came from Arrhenius, Bronsted, and Lowry. These ideas inv ...
... What is a Lewis base? What is a Lewis acid? Let me start by stating that we are familiar with many bases and acids. Those we know to be bases are Lewis bases and those we know to be acids are Lewis acids. Our previous ideas of bases and acids came from Arrhenius, Bronsted, and Lowry. These ideas inv ...
Chemical Reactions
... Some steps for doing reactions 1. Identify the type of reaction 2. Predict the product(s) using the type of reaction 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 ...
... Some steps for doing reactions 1. Identify the type of reaction 2. Predict the product(s) using the type of reaction 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 ...
Equilibrium Review worksheet
... In a rigid 1.00 L laboratory reaction vessel, a technician places 1.00 mol of each of the four substances involved in this equilibrium. The vessel is heated to 650 °C. Determine the equilibrium amount concentrations of each substance, organizing your values in an ICE table. (Hint: use the value of K ...
... In a rigid 1.00 L laboratory reaction vessel, a technician places 1.00 mol of each of the four substances involved in this equilibrium. The vessel is heated to 650 °C. Determine the equilibrium amount concentrations of each substance, organizing your values in an ICE table. (Hint: use the value of K ...
Worksheet
... Other Decomposition Reactions There are three other decomposition reactions you need to know. The first is the decomposition of a hydrate. When a hydrate decomposes, water is removed. See below for the decomposition of. Ex: Barium iodide dihydrate is strongly heated BaI2·2H2O(s) BaI2(s) + 2H2O( ...
... Other Decomposition Reactions There are three other decomposition reactions you need to know. The first is the decomposition of a hydrate. When a hydrate decomposes, water is removed. See below for the decomposition of. Ex: Barium iodide dihydrate is strongly heated BaI2·2H2O(s) BaI2(s) + 2H2O( ...
chemical equation - Central Lyon CSD
... Types of Chemical Reactions • The heat and smoke of burning charcoal are the products of a combustion reaction. Combustion is one of the five general types of chemical reactions. If you can recognize a reaction as being a particular type, you may be able to predict the products of the reaction. ...
... Types of Chemical Reactions • The heat and smoke of burning charcoal are the products of a combustion reaction. Combustion is one of the five general types of chemical reactions. If you can recognize a reaction as being a particular type, you may be able to predict the products of the reaction. ...
1C - Edexcel
... An atom of boron can be represented as 115B (a) Use numbers from the box to complete the sentences about this atom of boron. ...
... An atom of boron can be represented as 115B (a) Use numbers from the box to complete the sentences about this atom of boron. ...
Unit 2: Chemical Reactions
... • A chemical formula is an abbreviation for a chemical compound using chemical symbols and numbers. • The subscript number tells how many atoms of the element are present in the compound • Example: CO2 = Carbon Dioxide – Di = 2 – 1 Carbon atom and 2 oxygen atoms ...
... • A chemical formula is an abbreviation for a chemical compound using chemical symbols and numbers. • The subscript number tells how many atoms of the element are present in the compound • Example: CO2 = Carbon Dioxide – Di = 2 – 1 Carbon atom and 2 oxygen atoms ...
IGCSE Revision document
... Sodium chloride NaCl is a ____________. There are __________ bonds between the two the same/ different numbers of electrons. elements _________ and _________. When these atoms bond one ____________ from the • Isotopes are atoms of the same element with ___________ atom is donated to the ____________ ...
... Sodium chloride NaCl is a ____________. There are __________ bonds between the two the same/ different numbers of electrons. elements _________ and _________. When these atoms bond one ____________ from the • Isotopes are atoms of the same element with ___________ atom is donated to the ____________ ...
with answers
... Foreign students may use a dictionary (mother tongue – English) but this may not contain any handwritten notes. The use of a calculator is not permitted. Numerical answers that are given without showing any working or explanation will receive no marks. In general, short answers with keywords will be ...
... Foreign students may use a dictionary (mother tongue – English) but this may not contain any handwritten notes. The use of a calculator is not permitted. Numerical answers that are given without showing any working or explanation will receive no marks. In general, short answers with keywords will be ...
Lab #4: Chemical Reactions
... one minute, light a wooden splint with a Bunsen burner, then remove your thumb and hold the burning splint to the mouth of the test tube. You will hear a sound when the H2 gas that was produced in reaction C-2 undergoes a second reaction when it reaction with oxygen. Dispose of the solution from thi ...
... one minute, light a wooden splint with a Bunsen burner, then remove your thumb and hold the burning splint to the mouth of the test tube. You will hear a sound when the H2 gas that was produced in reaction C-2 undergoes a second reaction when it reaction with oxygen. Dispose of the solution from thi ...
PPT - Unit 5
... -(C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(l) ΔH = -1300. kJ) 2( C(s) + O2(g) → CO2(g) ) 2(ΔH = -394 kJ) H2(g) + 1/2O2(g) → H2O(l) ΔH = -286 kJ Calculate ΔH for the following reaction: 2C(s) + H2(g) → C2H2(g) 2C(s) + 2O2(g) → 2CO2(g) ΔH = -788 kJ 2CO2(g) + H2O(l) → C2H2(g) + 5/2O2(g) ΔH = +1300 kJ H2(g) + ...
... -(C2H2(g) + 5/2O2(g) → 2CO2(g) + H2O(l) ΔH = -1300. kJ) 2( C(s) + O2(g) → CO2(g) ) 2(ΔH = -394 kJ) H2(g) + 1/2O2(g) → H2O(l) ΔH = -286 kJ Calculate ΔH for the following reaction: 2C(s) + H2(g) → C2H2(g) 2C(s) + 2O2(g) → 2CO2(g) ΔH = -788 kJ 2CO2(g) + H2O(l) → C2H2(g) + 5/2O2(g) ΔH = +1300 kJ H2(g) + ...
Unit 3 Ch. 9 - Classifying Chemical Reactions
... When silver tarnishes, it combines with sulfur and forms silver sulfide (Ag2S). Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. The silver can be returned to its former luster by removing the silver sulfide coating from the surfac ...
... When silver tarnishes, it combines with sulfur and forms silver sulfide (Ag2S). Silver sulfide is black. When a thin coating of silver sulfide forms on the surface of silver, it darkens the silver. The silver can be returned to its former luster by removing the silver sulfide coating from the surfac ...
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.