Chem 130 Exam 3 Test Questions with
Actual Detailed Solutions 2026
Updated.
Chemical Reactions - Answer the organization of atoms in one or more substances
the bonds are broken and formed, with the same number of atoms on each side of the arrow
stoichiometry - Answer a mathematical means of getting from one unit to another (utilizing
a chemical equation)
dependent on: nature of the reaction - the exact nature of the chemicals when dissolved
-amount of chemicals present- molarity
stoichiometric mixture - Answer one that possesses equivalent amounts of reactants that
match the numbers in the balanced equation
limiting reagent - Answer determines the amount of product formed. The reactant that runs
out first and thus limits the number of products that can be formed. stoichiometry and
balanced equation are used.
hydration - Answer interaction between H2O molecules and ions of salt, causing dissolution
broken into cations and anions
solubility - Answer depends on the attraction of ions to one another and the attraction of
ions to H2O molecules
many nonionic solids are soluble
solute - Answer substance dissolved
solvent - Answer liquid that does the dissolving
electrical conductivity - Answer ability to conduct electricity
, insoluble salts/ weak acids and bases
non electrolytes - Answer do not conduct electricity
organic molecules
substances that do not produce ant ions when dissolved
ethanol in H2O
molecules dispersed- dont go into ions
strong electrolytes - Answer completely ionize upon dissolution
soluble salts
strong acids/bases
ionization reactions to make H+ and OH-
weak electrolytes - Answer produce fewer ions when dissolved
weak acids
weak bases
molarity (M) - Answer moles of solvent/ moles of solution
M1V1=M2V2
Dilution - Answer the addition of H2O to a concentrated solution in order to achieve the
desired molarity
volumetric/ measuring pipettes
M1V1=M2V2
Precipitation Reactions - Answer a reaction in which the mixing of 2 solutions results in the
formation of an insoluble substance which separates from the solution
precipitate - Answer solid formed in a precipitation reaction
to identify know the solubility rules
must have a 0 net charge
only one type of cation and one anion
Actual Detailed Solutions 2026
Updated.
Chemical Reactions - Answer the organization of atoms in one or more substances
the bonds are broken and formed, with the same number of atoms on each side of the arrow
stoichiometry - Answer a mathematical means of getting from one unit to another (utilizing
a chemical equation)
dependent on: nature of the reaction - the exact nature of the chemicals when dissolved
-amount of chemicals present- molarity
stoichiometric mixture - Answer one that possesses equivalent amounts of reactants that
match the numbers in the balanced equation
limiting reagent - Answer determines the amount of product formed. The reactant that runs
out first and thus limits the number of products that can be formed. stoichiometry and
balanced equation are used.
hydration - Answer interaction between H2O molecules and ions of salt, causing dissolution
broken into cations and anions
solubility - Answer depends on the attraction of ions to one another and the attraction of
ions to H2O molecules
many nonionic solids are soluble
solute - Answer substance dissolved
solvent - Answer liquid that does the dissolving
electrical conductivity - Answer ability to conduct electricity
, insoluble salts/ weak acids and bases
non electrolytes - Answer do not conduct electricity
organic molecules
substances that do not produce ant ions when dissolved
ethanol in H2O
molecules dispersed- dont go into ions
strong electrolytes - Answer completely ionize upon dissolution
soluble salts
strong acids/bases
ionization reactions to make H+ and OH-
weak electrolytes - Answer produce fewer ions when dissolved
weak acids
weak bases
molarity (M) - Answer moles of solvent/ moles of solution
M1V1=M2V2
Dilution - Answer the addition of H2O to a concentrated solution in order to achieve the
desired molarity
volumetric/ measuring pipettes
M1V1=M2V2
Precipitation Reactions - Answer a reaction in which the mixing of 2 solutions results in the
formation of an insoluble substance which separates from the solution
precipitate - Answer solid formed in a precipitation reaction
to identify know the solubility rules
must have a 0 net charge
only one type of cation and one anion
