Chapter 11: Chemical Reactions Study Guide

chemical equationA representation of a chemical reaction with reactants on the left, products on the right, and an arrow separating the two
skeleton equationA chemical equation that does not indicate the relative amounts of the reactants and products
catalystA substance that speeds up the reaction but is not used up in the reaction
coefficientSmall whole number ratios that are placed in front of the formulas in an equation in order to balance it
balanced equationA equation where each side of the equation has the same number of atoms of each element, and mass is conserved
word equationIron + oxygen —> iron (III) oxide is an example of a(n)?
chemical equationFe + O2 —> Fe2O3 is an example of a(n)?
2H2 + O2 —> 2H2OBalance H2 + O2 —> H2O
2AgNO3 + H2S —> Ag2S + 2HNO3Balance AgNO3 + H2S —> Ag2S + HNO3
solid, gas, liquid, and aqueousWhat do (s), (g), (l) and (aq) stand for?
combination reactionA chemical change in which two or more substances react to form a single new substance
decomposition reactionA chemical change in which a single compound breaks down into two or more simpler products
single replacement reactionA chemical change in which one element replaces a second element in a compound
double replacement reactionA chemical change involving an exchange of positive ions between two compounds
combustion reactionA chemical change in which an element or compound reacts with oxygen, often producing energy in the form of heat or light.
combinationIs 2Mg(s) + O2(g) —> 2MgO a combination, decomposition, or single replacement reaction?
decompositionIs HgO(s) —> Hg(l) + O2(g) a combination, decomposition, or single replacement reaction?
single replacementIs 2K(s) + 2H2O(l) —> 2KOH(aq) + H2(g) a combination, decomposition, or single replacement reaction?
activity seriesA list of metals in order of decreasing reactivity
combinationReactants: 2 elements
Products: A single compound
Is it a combination, decomposition, single replacement, double replacement, or combustion reaction?
decompositionReactants: A single compound
Products: Two or more elements/compounds
Is it a combination, decomposition, single replacement, double replacement, or combustion reaction?
single replacementReactants: An element and a compound
Products: A different elements and new compound
Is it a combination, decomposition, single replacement, double replacement, or combustion reaction?
double replacementReactants: Two ionic compounds
Products: Two new compounds
Is it a combination, decomposition, single replacement, double replacement, or combustion reaction?
combustionReactants: Oxygen and a compound of C, H, O
Products: CO2 and H2O
Is it a combination, decomposition, single replacement, double replacement, or combustion reaction?
complete ionic equationAn equation that shows dissolved ionic compounds as dissociated free ions
spectator ionAn ion that appears on both sides of an equation and is not directly involved in the reaction
net ionic equationAn equation for a reaction in solution that shows only those particles that are directly involved in the chemical change
complete ionicIs Ag+(aq) + NO3-(aq) +Na+(aq) + Cl-(aq) —> AgCl(s) + Na+(aq) + NO3-(aq) a complete ionic equation or a net ionic equation?
net ionicIs Ag+(aq) + Cl-(aq) —> AgCl(s) a complete ionic equation or a net ionic equation?
mass and chargeIn a net ionic equation, what two things are balanced?