Chemical Reactions
... Pick up sock and board. Complete the Do Now via QR code or link I will be about 15-30 min late. This should be completed by the time I arrive. http://bit.ly/1LvB4ak ...
... Pick up sock and board. Complete the Do Now via QR code or link I will be about 15-30 min late. This should be completed by the time I arrive. http://bit.ly/1LvB4ak ...
Barnard Castle School Chemistry Department
... Be familiar with the names and symbols of the 1st 20 elements in the Periodic Table (ie. H, He, B, Be …….to Ca). Compounds have very different properties to the elements from which they are formed. It is often difficult to break compounds up into their elements (because the atoms are chemically join ...
... Be familiar with the names and symbols of the 1st 20 elements in the Periodic Table (ie. H, He, B, Be …….to Ca). Compounds have very different properties to the elements from which they are formed. It is often difficult to break compounds up into their elements (because the atoms are chemically join ...
2.4 Chemical Reactions
... •" Enzymes are catalysts in living things. –" Enzymes are needed for almost all processes. –" Most enzymes are proteins. ...
... •" Enzymes are catalysts in living things. –" Enzymes are needed for almost all processes. –" Most enzymes are proteins. ...
Paper
... (i) Under what circumstances can ionic compounds conduct electricity? (j) Which class of organic compound is responsible for the odour associated with fruits such as apples, oranges, pears, bananas and strawberries? (k) Answer part A or part B. A ...
... (i) Under what circumstances can ionic compounds conduct electricity? (j) Which class of organic compound is responsible for the odour associated with fruits such as apples, oranges, pears, bananas and strawberries? (k) Answer part A or part B. A ...
Homogeneous and Heterogeneous Catalysis
... required to reach the transition state. Unlike reactants, a catalyst is not consumed as part of the reaction process. Catalysts can be divided into two types depending on the reaction phase that they occupy: homogeneous and heterogeneous. Homogeneous catalysts are those that occupy the same phase as ...
... required to reach the transition state. Unlike reactants, a catalyst is not consumed as part of the reaction process. Catalysts can be divided into two types depending on the reaction phase that they occupy: homogeneous and heterogeneous. Homogeneous catalysts are those that occupy the same phase as ...
Smith Reaction- HW PSI Chemistry
... B) one of the reactants is often water C) the reactants are generally two ionic compounds in aqueous solution D) energy in the form of heat or light is often produced 48) A double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of the products ...
... B) one of the reactants is often water C) the reactants are generally two ionic compounds in aqueous solution D) energy in the form of heat or light is often produced 48) A double-replacement reaction takes place when aqueous Na2CO3 reacts with aqueous Sn(NO3)2. You would expect one of the products ...
AP Chemistry Jeopardy
... a) The heat absorbed depends only on the number of atoms b) the heat absorbed depends on the volume change with temperature c) the heat absorbed can be calculated from the 1st Law of Thermodynamics ...
... a) The heat absorbed depends only on the number of atoms b) the heat absorbed depends on the volume change with temperature c) the heat absorbed can be calculated from the 1st Law of Thermodynamics ...
CHEMISTRY EXAM 2 REVIEW
... Periodic Table, Physical and Chemical Properties, Changes, and Reactions Guardian Signature: _________________________________________________________________ My child completed this review and studied for at least 30 minutes. Define the following chemistry terms: [Chemistry Dictionary] 1. alloy a m ...
... Periodic Table, Physical and Chemical Properties, Changes, and Reactions Guardian Signature: _________________________________________________________________ My child completed this review and studied for at least 30 minutes. Define the following chemistry terms: [Chemistry Dictionary] 1. alloy a m ...
Homework Exercises
... The concentrated ammonia solution is diluted exactly 100 times. The diluted solution of ammonia is titrated with 0.1 moll-1 hydrochloric acid. ...
... The concentrated ammonia solution is diluted exactly 100 times. The diluted solution of ammonia is titrated with 0.1 moll-1 hydrochloric acid. ...
Introductory Chemistry Test Review
... 25. In the laboratory, potassium chlorate will decompose when heated to form potassium chloride and oxygen gas according to the following equation. Calculate how much oxygen in grams is produced when 35.0 grams of potassium chlorate decomposes. 2 KClO3(s) ...
... 25. In the laboratory, potassium chlorate will decompose when heated to form potassium chloride and oxygen gas according to the following equation. Calculate how much oxygen in grams is produced when 35.0 grams of potassium chlorate decomposes. 2 KClO3(s) ...
- Palisades School District
... 1. Using your knowledge of metric units, English units, and the information in your text, write down the conversion factors that you would need to convert the following: a. mm to nm b. mg to kg c. km to ft d. in.3 to cm3 2. A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It c ...
... 1. Using your knowledge of metric units, English units, and the information in your text, write down the conversion factors that you would need to convert the following: a. mm to nm b. mg to kg c. km to ft d. in.3 to cm3 2. A sample of ascorbic acid (vitamin C) is synthesized in the laboratory. It c ...
03. The Theoretic bases of bioenergetics
... E a = activation energy R = 8.314 [ J · mol -1 · K -1 ] T = absolute temperature in degrees Kelvin A = pre-exponential or frequency factor A = p · Z, where Z is the collision rate and p is a steric factor. Z turns out to be only weakly dependant on temperature. Thus the frequency factor is a constan ...
... E a = activation energy R = 8.314 [ J · mol -1 · K -1 ] T = absolute temperature in degrees Kelvin A = pre-exponential or frequency factor A = p · Z, where Z is the collision rate and p is a steric factor. Z turns out to be only weakly dependant on temperature. Thus the frequency factor is a constan ...
Aim # 8: How do we write and balance a chemical equation?
... fact that mass has been conserved in this chemical reaction? Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) ...
... fact that mass has been conserved in this chemical reaction? Pb(NO3)2(aq) + 2KI(aq) → PbI2(s) + 2KNO3(aq) ...
- Cypress HS
... with small portions of NaOH solution (discard the rinsings); then fill the buret with NaOH solution. Keep the remainder of the NaOH solution in the beaker covered until it is needed. Clean two 250 mL Erlenmeyer flasks for use as titration vessels. Rinse the flasks with tap water; follow with small p ...
... with small portions of NaOH solution (discard the rinsings); then fill the buret with NaOH solution. Keep the remainder of the NaOH solution in the beaker covered until it is needed. Clean two 250 mL Erlenmeyer flasks for use as titration vessels. Rinse the flasks with tap water; follow with small p ...
ppt
... Types of Chemical Reactions • Atoms and molecules react to create chemical reactions. • There are thousands of different chemical reactions, where atoms are never lost, just rearranged. ...
... Types of Chemical Reactions • Atoms and molecules react to create chemical reactions. • There are thousands of different chemical reactions, where atoms are never lost, just rearranged. ...
Science 9
... What are the properties of ionic compounds? (list 2 properties, and what ionic compounds are made of) ...
... What are the properties of ionic compounds? (list 2 properties, and what ionic compounds are made of) ...
Chemical Equations and Tests for anions
... The total mass of the products of a chemical reaction is the same as the total mass of the reactants For example if 12 grams of Carbon dioxide react with 32 grams of oxygen 44 grams of carbon dioxide will be formed ...
... The total mass of the products of a chemical reaction is the same as the total mass of the reactants For example if 12 grams of Carbon dioxide react with 32 grams of oxygen 44 grams of carbon dioxide will be formed ...
CHEM102 Chemistry II Spring 10-11 Mid
... E) 70.8 kcal are produced when 32.1 g of sulfur reacts. 14) A reaction is said to be ________ if the bonds formed during the reaction are stronger than the bonds broken. 14) C A) endothermic B) endergonic C) exothermic D) spontaneous E) exergonic 15) When a reaction system is at equilibrium 15) B A ...
... E) 70.8 kcal are produced when 32.1 g of sulfur reacts. 14) A reaction is said to be ________ if the bonds formed during the reaction are stronger than the bonds broken. 14) C A) endothermic B) endergonic C) exothermic D) spontaneous E) exergonic 15) When a reaction system is at equilibrium 15) B A ...
CHEMISTRY FINAL EXAM REVIEW SHEET
... Proton: +1 charge, located in nucleus, relative mass = 1 amu Neutron: No charge, located in nucleus, relative mass = 1 amu Electron: -1 charge, located outside of nucleus, relative mass = 1/1840 amu Atomic Number = number of protons in an element. Mass Number = number of protons + neutrons in an ele ...
... Proton: +1 charge, located in nucleus, relative mass = 1 amu Neutron: No charge, located in nucleus, relative mass = 1 amu Electron: -1 charge, located outside of nucleus, relative mass = 1/1840 amu Atomic Number = number of protons in an element. Mass Number = number of protons + neutrons in an ele ...
honors final key
... c. A barium sulfate precipitate and aqueous sodium chloride are formed from the metathesis reaction between barium chloride and sodium sulfate solutions. BaCl2(aq) + Na2SO4(aq) BaSO4(s) + NaCl(aq) double replacement will occur forms a precipitate ...
... c. A barium sulfate precipitate and aqueous sodium chloride are formed from the metathesis reaction between barium chloride and sodium sulfate solutions. BaCl2(aq) + Na2SO4(aq) BaSO4(s) + NaCl(aq) double replacement will occur forms a precipitate ...
Section 16.1 A Model for Reaction Rates
... • Q7: Summarize what happens during the brief existence of an activated complex. • Bonds in the reactants are in the process of breaking, while new bonds are beginning to form to produce the products. • Q8: Apply collision theory to explain why collisions between two reacting particles do not alway ...
... • Q7: Summarize what happens during the brief existence of an activated complex. • Bonds in the reactants are in the process of breaking, while new bonds are beginning to form to produce the products. • Q8: Apply collision theory to explain why collisions between two reacting particles do not alway ...
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.