Name
... a. Theoretical yield b. Percentage yield c. Mole ratio d. Actual yield 14. For the reaction Cl2 + 2KBr → 2KCl +Br2, calculate the percentage yield if 200g of chlorine react with excess potassium bromide to produce 410g of bromine. a. 73.4% b. 82.1% c. 91.0% d. 98.9% 15. For the reaction Mg + 2HCl → ...
... a. Theoretical yield b. Percentage yield c. Mole ratio d. Actual yield 14. For the reaction Cl2 + 2KBr → 2KCl +Br2, calculate the percentage yield if 200g of chlorine react with excess potassium bromide to produce 410g of bromine. a. 73.4% b. 82.1% c. 91.0% d. 98.9% 15. For the reaction Mg + 2HCl → ...
Health and Safety Services
... 8. For any chemical reaction, there are numerous risks to consider and many of these will need to be included in your COSHH assessments and general laboratory/ safe systems of working. Remember that risk assessments must include hazards that arise from the chemical reaction itself, most importantly: ...
... 8. For any chemical reaction, there are numerous risks to consider and many of these will need to be included in your COSHH assessments and general laboratory/ safe systems of working. Remember that risk assessments must include hazards that arise from the chemical reaction itself, most importantly: ...
Unit 3 - Salina USD 305
... ◦ Begin Worksheet #2 ◦ Wrap Up – Reaction Sort Homework (Write in Planner): ◦ Worksheet #2 (Optional) ...
... ◦ Begin Worksheet #2 ◦ Wrap Up – Reaction Sort Homework (Write in Planner): ◦ Worksheet #2 (Optional) ...
Ch 11 Chemical Reactions
... We can’t remember them all, but most fall into one of several categories. We will learn the 5 major types, and given the reactants, predict products for a given type For some, we will be able to: c) predict whether or not they will happen at all. How? Recognize them by their reactants ...
... We can’t remember them all, but most fall into one of several categories. We will learn the 5 major types, and given the reactants, predict products for a given type For some, we will be able to: c) predict whether or not they will happen at all. How? Recognize them by their reactants ...
AP Chapter Five Outline
... Oxidation numbers of atoms in molecular compound are assigned as though electrons were completely transferred to form ions. B. Rules for Determining Oxidation Numbers: 1. The oxidation number of an atom of a pure element is zero. 2. The oxidation of a monatomic ion equals its charge. 3. Hydrogen’s ...
... Oxidation numbers of atoms in molecular compound are assigned as though electrons were completely transferred to form ions. B. Rules for Determining Oxidation Numbers: 1. The oxidation number of an atom of a pure element is zero. 2. The oxidation of a monatomic ion equals its charge. 3. Hydrogen’s ...
4 - Ms McRae`s Science
... a)yes bec an increase in the temperature of the HCl will increase the velocity of the reactant particles which will increase the number of collisions AND increase the number of effective collisions i.e. ones that have sufficient energy (activation energy) to react b) skipping this one for now until ...
... a)yes bec an increase in the temperature of the HCl will increase the velocity of the reactant particles which will increase the number of collisions AND increase the number of effective collisions i.e. ones that have sufficient energy (activation energy) to react b) skipping this one for now until ...
Chemical Equations and Reaction Types Lab
... 3) Determine the products and write the correct formula for each product. Once the correct formula is written it must not be changed during the subsequent balancing operation. 4) Balance the chemical equation. Do NOT change any chemical formulas while balancing. a) Choose the compound with the great ...
... 3) Determine the products and write the correct formula for each product. Once the correct formula is written it must not be changed during the subsequent balancing operation. 4) Balance the chemical equation. Do NOT change any chemical formulas while balancing. a) Choose the compound with the great ...
F Practice Test #2 Solutions
... C) No reaction will occur. D) Both KNO3 and NiS precipitate from solution. E) KNO3 will precipitate from solution. 10. Which of the following statements concerning equilibrium is not true? A) The equilibrium constant is independent of temperature. B) The value of the equilibrium constant for a given ...
... C) No reaction will occur. D) Both KNO3 and NiS precipitate from solution. E) KNO3 will precipitate from solution. 10. Which of the following statements concerning equilibrium is not true? A) The equilibrium constant is independent of temperature. B) The value of the equilibrium constant for a given ...
Chapter 9 Notes - Get a Clue with Mrs. Perdue
... happen if pepsin was put in an environment with a pH of 8? Pepsin would not work or not work as well due to being out of its ideal environment. ...
... happen if pepsin was put in an environment with a pH of 8? Pepsin would not work or not work as well due to being out of its ideal environment. ...
CHEM121 Lecture Ch5 student
... How much carbon dioxide (in grams) is produced when 3.00 g of ethanol (C2H6O) combusts in air? How much oxygen gas is used up to combust 5.00 g of ethanol? ...
... How much carbon dioxide (in grams) is produced when 3.00 g of ethanol (C2H6O) combusts in air? How much oxygen gas is used up to combust 5.00 g of ethanol? ...
Stoichiometry
... Two compounds are involved with the cation of one compound EXCHANGING with the cation of another compound. AX + BZ AZ + BX These reactions proceed if one of the ff. is satisfied: 1. An insoluble/slightly soluble product is formed (PRECIPITATE formation) 2. A weakly ionized species is produced. The ...
... Two compounds are involved with the cation of one compound EXCHANGING with the cation of another compound. AX + BZ AZ + BX These reactions proceed if one of the ff. is satisfied: 1. An insoluble/slightly soluble product is formed (PRECIPITATE formation) 2. A weakly ionized species is produced. The ...
Practice Exam 2 - Department of Chemistry and Biochemistry
... A) atoms are held together by sharing electrons. B) oppositely charged ions are held together by strong electrical attractions. C) atoms of different metals form bonds. D) atoms of noble gases are held together by attractions between oppositely charged ions. E) atoms of metals form bonds to atoms of ...
... A) atoms are held together by sharing electrons. B) oppositely charged ions are held together by strong electrical attractions. C) atoms of different metals form bonds. D) atoms of noble gases are held together by attractions between oppositely charged ions. E) atoms of metals form bonds to atoms of ...
Answer Key to Sample Questions
... Is the reaction product favored at 298 K? yes because Go is negative. c. In what temperature range will this reaction be favored? Circle one, and fill in a temperature IF you choose one of the ones on the right side. At all temperatures. 16. Using free energy of formation values (get them from OWL) ...
... Is the reaction product favored at 298 K? yes because Go is negative. c. In what temperature range will this reaction be favored? Circle one, and fill in a temperature IF you choose one of the ones on the right side. At all temperatures. 16. Using free energy of formation values (get them from OWL) ...
Predicting Products online assistance #3
... 2. decomposition - one reactant decomposes, or breaks apart, into two or more products. 3. single replacement - an element replaces another in a compound. 4. double replacement - the elements in two compounds switch partners to form two new compounds. Writing Balanced Equations A chemical reaction i ...
... 2. decomposition - one reactant decomposes, or breaks apart, into two or more products. 3. single replacement - an element replaces another in a compound. 4. double replacement - the elements in two compounds switch partners to form two new compounds. Writing Balanced Equations A chemical reaction i ...
Lecture 5 – Chemical Reactions
... left-land side of the equation and the chemical symbols for the products are placed on the right-hand side. b. Either an arrow (→) or and equal sign (=) are used to indicate the reactants converting to products. ...
... left-land side of the equation and the chemical symbols for the products are placed on the right-hand side. b. Either an arrow (→) or and equal sign (=) are used to indicate the reactants converting to products. ...
Dr. Ali Ebneshahidi
... the ability of a solution to change the tone or shape of cells by changing their internal H2O volume. - Hypertonic: solutions with higher osmotic pressure cells in a Hypertonic solution lose H2O and shrink. - Hypotonic : solution with a lower osmotic pressure cells in hyportonic solution gain ...
... the ability of a solution to change the tone or shape of cells by changing their internal H2O volume. - Hypertonic: solutions with higher osmotic pressure cells in a Hypertonic solution lose H2O and shrink. - Hypotonic : solution with a lower osmotic pressure cells in hyportonic solution gain ...
Chemical Reactions
... the formulas for the reactants on the left balancing elements that appear only and the formulas for the products on the once on each side of the equation. Never balance an equation by changing right with a yields sign (→) in between. If two or more reactants or products are the subscripts in a chemi ...
... the formulas for the reactants on the left balancing elements that appear only and the formulas for the products on the once on each side of the equation. Never balance an equation by changing right with a yields sign (→) in between. If two or more reactants or products are the subscripts in a chemi ...
2. NH3 - Huffman Chemistry Website!
... Predict the products and balance the following chemical reactions. Write the type of reaction and then give the chemical name of the products. a. ...
... Predict the products and balance the following chemical reactions. Write the type of reaction and then give the chemical name of the products. a. ...
Rates of Reaction: Chemical Kinetics 50
... A. increases as temperature decreases. B. decreases when a catalyst is added. C. increases as reactant concentration increases. D. decreases as reactant concentration increases. ...
... A. increases as temperature decreases. B. decreases when a catalyst is added. C. increases as reactant concentration increases. D. decreases as reactant concentration increases. ...
CHEM102 Chemistry II Spring 11-12 Mid
... 28) Which of the following can serve as the solvent in a solution? 28) ______ A) a liquid B) a gas C) a solid D) a mixture of comingled liquids E) all of the above 29) If the concentration of H3O+ is 3.5 × 10-3 M, the concentration of OH- is ________ M. 29) ______ A) 3.5 × 10-11 B) 1.0 × 10-12 C) 2. ...
... 28) Which of the following can serve as the solvent in a solution? 28) ______ A) a liquid B) a gas C) a solid D) a mixture of comingled liquids E) all of the above 29) If the concentration of H3O+ is 3.5 × 10-3 M, the concentration of OH- is ________ M. 29) ______ A) 3.5 × 10-11 B) 1.0 × 10-12 C) 2. ...
Masterton and Hurley Chapter 4
... 1. The oxidation number of an element that is alone (including diatomic elements) is zero. 2. The oxidation number of a element in a monatomic ion is the charge on the ion 3. Certain elements have the same oxidation number in most compounds a. Group 1 metals are +1 b. Group 2 metals are +2 c. Oxygen ...
... 1. The oxidation number of an element that is alone (including diatomic elements) is zero. 2. The oxidation number of a element in a monatomic ion is the charge on the ion 3. Certain elements have the same oxidation number in most compounds a. Group 1 metals are +1 b. Group 2 metals are +2 c. Oxygen ...
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.