Chapter 4
... chapter, we will discuss three major categories of reactions that occur in aqueous solutions: precipitation reactions, acid-base reactions, and redox reactions. In later chapters, we will study the structural characteristics and properties of water—the so-called universal solvent— and its solutions. ...
... chapter, we will discuss three major categories of reactions that occur in aqueous solutions: precipitation reactions, acid-base reactions, and redox reactions. In later chapters, we will study the structural characteristics and properties of water—the so-called universal solvent— and its solutions. ...
Rates of Reaction
... – A more useful mathematical relationship would show how a reactant concentration changes over a period of time. ...
... – A more useful mathematical relationship would show how a reactant concentration changes over a period of time. ...
Review Packet Answers - Bremerton School District
... Thus the amount of solid NH4HS present does not affect the equilibrium. b) two points The equilibrium pressure of NH3 gas would decrease. In order for the pressure equilibrium constant, Kp, to remain constant, the equilibrium pressure of NH3 must decrease when the pressure of H2S is increased. Kp = ...
... Thus the amount of solid NH4HS present does not affect the equilibrium. b) two points The equilibrium pressure of NH3 gas would decrease. In order for the pressure equilibrium constant, Kp, to remain constant, the equilibrium pressure of NH3 must decrease when the pressure of H2S is increased. Kp = ...
Theoretical problems
... We have provided this set of problems with the intention of making the preparation for the 43rd International Chemistry Olympiad easier for both students and mentors. We restricted ourselves to the inclusion of only a few topics that are not usually covered in secondary schools. There are six such a ...
... We have provided this set of problems with the intention of making the preparation for the 43rd International Chemistry Olympiad easier for both students and mentors. We restricted ourselves to the inclusion of only a few topics that are not usually covered in secondary schools. There are six such a ...
RedOx notes:
... Continue with elements picking their preferred charges (work from outside columns to the inner “valley of confusion”) until there is only one left; if the element is last to choose it must have the charge that makes everything else sum to zero. If you don’t choose first you might not get your first ...
... Continue with elements picking their preferred charges (work from outside columns to the inner “valley of confusion”) until there is only one left; if the element is last to choose it must have the charge that makes everything else sum to zero. If you don’t choose first you might not get your first ...
Test
... Use the following to answer questions 35-36: Nitric oxide, an important pollutant in air, is formed from the elements nitrogen and oxygen at high temperatures, such as those obtained when gasoline burns in an automobile engine. At 2000°C, K for the reaction N 2(g) + O2(g) 2NO(g) is 0.01. ...
... Use the following to answer questions 35-36: Nitric oxide, an important pollutant in air, is formed from the elements nitrogen and oxygen at high temperatures, such as those obtained when gasoline burns in an automobile engine. At 2000°C, K for the reaction N 2(g) + O2(g) 2NO(g) is 0.01. ...
Osmium(VIII) Catalyzed Oxidation of 6-Aminopenicillanic Acid
... an inert atmosphere. On diluting the reaction mixture with methanol, a white precipitate was formed, indicating the intervention of free radicals in the reaction. The blank experiments of either DPC or 6-aminopenicillanic acid alone with acrylonitrile did not induce any polymerization under the same ...
... an inert atmosphere. On diluting the reaction mixture with methanol, a white precipitate was formed, indicating the intervention of free radicals in the reaction. The blank experiments of either DPC or 6-aminopenicillanic acid alone with acrylonitrile did not induce any polymerization under the same ...
Chapter 3 Stoichiometry: Calculations with Chemical
... 2. Change the numbers in front of the formulas (coefficients) to make the number of atoms of each element the same on both sides of the equation. Do not change the subscripts. 2C2H6 ...
... 2. Change the numbers in front of the formulas (coefficients) to make the number of atoms of each element the same on both sides of the equation. Do not change the subscripts. 2C2H6 ...
Equilibrium Notes - Chemistry Teaching Resources
... show no units but do not explain the reasons why. A very brief and simplistic explanation is given below. Equilibrium constants should be calculated using activity (relative concentration) not actual concentration. Simply, the concentration terms in the equilibrium constant equation shown above shou ...
... show no units but do not explain the reasons why. A very brief and simplistic explanation is given below. Equilibrium constants should be calculated using activity (relative concentration) not actual concentration. Simply, the concentration terms in the equilibrium constant equation shown above shou ...
Chemical reaction
A chemical reaction is a process that leads to the transformation of one set of chemical substances to another. Classically, chemical reactions encompass changes that only involve the positions of electrons in the forming and breaking of chemical bonds between atoms, with no change to the nuclei (no change to the elements present), and can often be described by a chemical equation. Nuclear chemistry is a sub-discipline of chemistry that involves the chemical reactions of unstable and radioactive elements where both electronic and nuclear changes may occur.The substance (or substances) initially involved in a chemical reaction are called reactants or reagents. Chemical reactions are usually characterized by a chemical change, and they yield one or more products, which usually have properties different from the reactants. Reactions often consist of a sequence of individual sub-steps, the so-called elementary reactions, and the information on the precise course of action is part of the reaction mechanism. Chemical reactions are described with chemical equations, which symbolically present the starting materials, end products, and sometimes intermediate products and reaction conditions.Chemical reactions happen at a characteristic reaction rate at a given temperature and chemical concentration. Typically, reaction rates increase with increasing temperature because there is more thermal energy available to reach the activation energy necessary for breaking bonds between atoms.Reactions may proceed in the forward or reverse direction until they go to completion or reach equilibrium. Reactions that proceed in the forward direction to approach equilibrium are often described as spontaneous, requiring no input of free energy to go forward. Non-spontaneous reactions require input of free energy to go forward (examples include charging a battery by applying an external electrical power source, or photosynthesis driven by absorption of electromagnetic radiation in the form of sunlight).Different chemical reactions are used in combinations during chemical synthesis in order to obtain a desired product. In biochemistry, a consecutive series of chemical reactions (where the product of one reaction is the reactant of the next reaction) form metabolic pathways. These reactions are often catalyzed by protein enzymes. Enzymes increase the rates of biochemical reactions, so that metabolic syntheses and decompositions impossible under ordinary conditions can occur at the temperatures and concentrations present within a cell.The general concept of a chemical reaction has been extended to reactions between entities smaller than atoms, including nuclear reactions, radioactive decays, and reactions between elementary particles as described by quantum field theory.