Electron Arrangement
... 2. Reaction Rates Reaction rates can be increased by increasing the number of collisions by: 1. Increasing the temperature of the reactants. 2. Increasing the concentration of the reactants. 3. Increasing the surface area by decreasing particle size. 4. Adding a catalyst (which does not get used up) ...
... 2. Reaction Rates Reaction rates can be increased by increasing the number of collisions by: 1. Increasing the temperature of the reactants. 2. Increasing the concentration of the reactants. 3. Increasing the surface area by decreasing particle size. 4. Adding a catalyst (which does not get used up) ...
File - Flipped Out Science with Mrs. Thomas!
... number of atoms of each element in chemical formulas containing substances 8.5F recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass 8.5E investigate how evidence of chemical reactions indicate that new substances wi ...
... number of atoms of each element in chemical formulas containing substances 8.5F recognize whether a chemical equation containing coefficients is balanced or not and how that relates to the law of conservation of mass 8.5E investigate how evidence of chemical reactions indicate that new substances wi ...
Chemistry Final - Practice Test I
... An atom of one or more substances are rearranged to form different substances b. Law of Definite Proportions (not Law of Conservation of Matter) A compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound. c. Balanced C ...
... An atom of one or more substances are rearranged to form different substances b. Law of Definite Proportions (not Law of Conservation of Matter) A compound contains the same elements in exactly the same proportions by mass regardless of the size of the sample or source of the compound. c. Balanced C ...
File
... d. none of these 2. The solvent in an aqueous solution is always a. Oxygen b. an acid c. a base d. water 3. A solid produced during a chemical reaction is called a (an) a. solute b. precipitate c. spectator ion d. solvent 4. Balance the following equation. Fe(s) + H2O(l) Fe2O3(s) + H2(g) 5. Balanc ...
... d. none of these 2. The solvent in an aqueous solution is always a. Oxygen b. an acid c. a base d. water 3. A solid produced during a chemical reaction is called a (an) a. solute b. precipitate c. spectator ion d. solvent 4. Balance the following equation. Fe(s) + H2O(l) Fe2O3(s) + H2(g) 5. Balanc ...
Microsoft Word format
... Students learn to differentiate the physical and chemical properties of substances, classify processes as physical or chemical changes, and learn that mass is conserved in chemical reactions. The observations include separation of iron and sulfur with a magnet, separation of sand and salt by dissolu ...
... Students learn to differentiate the physical and chemical properties of substances, classify processes as physical or chemical changes, and learn that mass is conserved in chemical reactions. The observations include separation of iron and sulfur with a magnet, separation of sand and salt by dissolu ...
Class Notes
... out. Just like in math, anything that is the same on both sides is cancelled. This leaves you with the “net ionic equation.” This is an equation for a reaction in solution that shows only those particles that are directly involved in the chemical change. Net ionic equations differentiate between ion ...
... out. Just like in math, anything that is the same on both sides is cancelled. This leaves you with the “net ionic equation.” This is an equation for a reaction in solution that shows only those particles that are directly involved in the chemical change. Net ionic equations differentiate between ion ...
Chemistry - Gorman Learning Center
... 8. Chemical reaction rates depend on factors that influence the frequency of collision of reactant molecules. As a basis for understanding this concept, students know: a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. ho ...
... 8. Chemical reaction rates depend on factors that influence the frequency of collision of reactant molecules. As a basis for understanding this concept, students know: a. the rate of reaction is the decrease in concentration of reactants or the increase in concentration of products with time. b. ho ...
Chapter 18: Chemical Thermodynamics
... Formation reactions have - _____________ product - produce a __________ mole of that product - use only ____________ as reactants in their standard states. Sign of H (__) Rxn is exothermic, gives off heat, heat is a product. (__) Rxn is endothermic, absorbs heat, heat is a reactant. Standard Mo ...
... Formation reactions have - _____________ product - produce a __________ mole of that product - use only ____________ as reactants in their standard states. Sign of H (__) Rxn is exothermic, gives off heat, heat is a product. (__) Rxn is endothermic, absorbs heat, heat is a reactant. Standard Mo ...
Matter_and_Change2
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
matter and - cloudfront.net
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
... • Solid: definite shape and volume • Liquid: Takes on shape of container, definite volume • Gas: Fills any space; compressible ...
Chemical Reactions.
... Which equation represents a single replacement reaction? • 2NaI(s) + Cl2(g) à 2NaCl(s) + I2(s) • 2NaI(aq) + Pb(NO3)2(aq) à 2NaNO3(aq) + PbI2(s) ...
... Which equation represents a single replacement reaction? • 2NaI(s) + Cl2(g) à 2NaCl(s) + I2(s) • 2NaI(aq) + Pb(NO3)2(aq) à 2NaNO3(aq) + PbI2(s) ...
CHEM MINI-COURSE SERIES M1.2___
... Before proceeding further with the study of chemical reactions, you should become more familiar with compounds and their formulas. The following discussion and hands-on exercise foucs on how to describe a compound: both in terms of the correct chemical formula and its appearance. Compounds are compo ...
... Before proceeding further with the study of chemical reactions, you should become more familiar with compounds and their formulas. The following discussion and hands-on exercise foucs on how to describe a compound: both in terms of the correct chemical formula and its appearance. Compounds are compo ...
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.