Equilibrium
... H2(g) + Br2(g) ↔ 2HBr(g) a. Write the equilibrium expression for this reaction b. Assume that equal molar amounts of H2 and Br2 were present at the beginning. Calculate the equilibrium concentration of H2 if the concentration of HBr is 0.500 M. 15. The following reaction reaches an equilibrium state ...
... H2(g) + Br2(g) ↔ 2HBr(g) a. Write the equilibrium expression for this reaction b. Assume that equal molar amounts of H2 and Br2 were present at the beginning. Calculate the equilibrium concentration of H2 if the concentration of HBr is 0.500 M. 15. The following reaction reaches an equilibrium state ...
15anespp
... This Powerpoint show is one of several produced to help students understand selected topics at AS and A2 level Chemistry. It is based on the requirements of the AQA and OCR specifications but is suitable for other examination boards. Individual students may use the material at home for revision purp ...
... This Powerpoint show is one of several produced to help students understand selected topics at AS and A2 level Chemistry. It is based on the requirements of the AQA and OCR specifications but is suitable for other examination boards. Individual students may use the material at home for revision purp ...
8 Chemical Equations Chapter Outline Chemical Equations
... Write the balanced chemical equation for the reaction of magnesium hydroxide and phosphoric acid to form magnesium phosphate and water. a. 3 Mg(OH)2 + 2 H3PO4 b. Mg(OH)2 + H3PO4 ...
... Write the balanced chemical equation for the reaction of magnesium hydroxide and phosphoric acid to form magnesium phosphate and water. a. 3 Mg(OH)2 + 2 H3PO4 b. Mg(OH)2 + H3PO4 ...
Document
... • “bed check” for electrons • description on how are electrons organized around the nucleus of protons and neutrons • Bohr model: Nils Bohr proposed electrons “orbit” around the atom’s nucleus in specific energy levels or orbits (electron shells) – these shells have a specific energy level – closer ...
... • “bed check” for electrons • description on how are electrons organized around the nucleus of protons and neutrons • Bohr model: Nils Bohr proposed electrons “orbit” around the atom’s nucleus in specific energy levels or orbits (electron shells) – these shells have a specific energy level – closer ...
Chapter 7: Recent advances in enzyme technology
... This represents a fairly complex relationship but a few generalisations may be made. If the product (C) is less polar than either reactant (A or B) then the yield generally increases with the relative concentration of the organic phase () to reach a plateau. If the reverse occurs, then there will b ...
... This represents a fairly complex relationship but a few generalisations may be made. If the product (C) is less polar than either reactant (A or B) then the yield generally increases with the relative concentration of the organic phase () to reach a plateau. If the reverse occurs, then there will b ...
Types of Chemical Reactions
... Avg. Atomic mass of Calcium = 40.08g Avg. Atomic mass of Chlorine = 35.45g Molar Mass of calcium chloride = 40.08 g/mol Ca + (2 X 35.45) g/mol Cl 110.98 g/mol CaCl2 ...
... Avg. Atomic mass of Calcium = 40.08g Avg. Atomic mass of Chlorine = 35.45g Molar Mass of calcium chloride = 40.08 g/mol Ca + (2 X 35.45) g/mol Cl 110.98 g/mol CaCl2 ...
Stoichiometry - hrsbstaff.ednet.ns.ca
... write and balance chemical equations to predict the reactions of selected organic compounds defining and giving examples of addition, substitution, elimination, esterification, and combustion reactions of hydrocarbon derivatives defining thermal and catalytic cracking comparing hydrocarbon c ...
... write and balance chemical equations to predict the reactions of selected organic compounds defining and giving examples of addition, substitution, elimination, esterification, and combustion reactions of hydrocarbon derivatives defining thermal and catalytic cracking comparing hydrocarbon c ...
exercise on Chapter 13 - Louisiana Tech University
... Reactant - a substance that is consumed by a chemical reaction Product - a substance that is produced by a chemical reaction. New Concepts Irreversible or complete reactions: Chemical reactions can be considered to have forward and backward reactions. In most chemical reactions, the rate of backward ...
... Reactant - a substance that is consumed by a chemical reaction Product - a substance that is produced by a chemical reaction. New Concepts Irreversible or complete reactions: Chemical reactions can be considered to have forward and backward reactions. In most chemical reactions, the rate of backward ...
Document
... • To balance a chemical equation • begin with atoms that appear only in one compound on the left and one on the right; in this case, begin with carbon (C) which occurs in C3H8 and CO2 C3 H8 (g) + O2 (g) ...
... • To balance a chemical equation • begin with atoms that appear only in one compound on the left and one on the right; in this case, begin with carbon (C) which occurs in C3H8 and CO2 C3 H8 (g) + O2 (g) ...
Enzymes: “Helper” Protein molecules
... Enzymes aren’t used up Enzymes are not changed by the reaction used only temporarily re-used again for the same reaction with other molecules very little enzyme needed to help in many reactions ...
... Enzymes aren’t used up Enzymes are not changed by the reaction used only temporarily re-used again for the same reaction with other molecules very little enzyme needed to help in many reactions ...
Ch2-A
... Atoms are united by ________ bonds What determines whether or not an atom will form a bond? _____________________________ _____________________________ Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ...
... Atoms are united by ________ bonds What determines whether or not an atom will form a bond? _____________________________ _____________________________ Copyright © 2006 Pearson Education, Inc., publishing as Benjamin Cummings ...
1 Mole
... Sometimes polyatomic ions break apart in a chemical reaction and sometimes they do not e.x. sulfate appears on both sides of the reaction so SO4 can be treated like one atom: Mg(s) + CuSO4(aq) MgSO4(aq) + Cu(s) e.x. carbonate breaks apart so atoms must be balanced individually: CaCO3(aq) + HCl ...
... Sometimes polyatomic ions break apart in a chemical reaction and sometimes they do not e.x. sulfate appears on both sides of the reaction so SO4 can be treated like one atom: Mg(s) + CuSO4(aq) MgSO4(aq) + Cu(s) e.x. carbonate breaks apart so atoms must be balanced individually: CaCO3(aq) + HCl ...
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.