UNE CHEM 1011 LAB FINAL QUESTIONS
WITH COMPLETE SOLUTIONS
solution correct answer: consists of a solvent (dissolving
medium) and one or more solutes; most of its properites are
dependent on the properties of the solute
Colligative properties correct answer: properties of a solution
that depend only on the number of particles dissolved in it, not
the properties of the particles themselves. The main ones are
boiling point elevation and freezing point depression.
Boiling point correct answer: temeperature where vapor
pressure equals atoms on the liquid;
-elevated boiling points are related to: 1) # concentration of
solute particles & 2) the nature of the solvent
**solutions with non-volatile solutes have a decreased vapor
pressure which means that an increased temp is req'd to boil the
solution than a pure solvent
how does solute affect freezing point correct answer: the
presence of the solute interferes with formation of a solid as th
eolutions cools; solutins with non-volatile solutes have a
decreased freezing points than pure solvents
hypotonic solution correct answer: if a cell is placed in a salt
concentration in a solution lower than that of the cell
, -->the water will move from the solution into the cell and will
expand
hypertonic solution correct answer: the cell is placed in a
solution of increased salt concentration and the ewater will
move from the inside of the cell to the solution and cell with
shrink
osmotic pressure correct answer: the pressure that must be
applied to stop the movement of solvent through the membrane
chemical kinetics correct answer: a study of how quickly
chemical reactions occur and the factors that affect this speed
reaction rate correct answer: speed of a chemical reaction; a
measure of the change in reactant concentrations over time
--> Rate= (concentration of A @t2 - conc of A @t1) / (t2-t1)
differences in reaction rates that are independent vs dependent
of concentration of reactant correct answer: ** if reaction rate is
independent of concentration = the amount of reactant consumed
and time is LINEAR
** if the reaction rate is dependent of concentration of reactant,
the relationship is curvilinear
rate law equation correct answer: rate = k [A]^x [B]^y
** A & B = the concentrations of the reactants
** x & y = the order of the reaction
WITH COMPLETE SOLUTIONS
solution correct answer: consists of a solvent (dissolving
medium) and one or more solutes; most of its properites are
dependent on the properties of the solute
Colligative properties correct answer: properties of a solution
that depend only on the number of particles dissolved in it, not
the properties of the particles themselves. The main ones are
boiling point elevation and freezing point depression.
Boiling point correct answer: temeperature where vapor
pressure equals atoms on the liquid;
-elevated boiling points are related to: 1) # concentration of
solute particles & 2) the nature of the solvent
**solutions with non-volatile solutes have a decreased vapor
pressure which means that an increased temp is req'd to boil the
solution than a pure solvent
how does solute affect freezing point correct answer: the
presence of the solute interferes with formation of a solid as th
eolutions cools; solutins with non-volatile solutes have a
decreased freezing points than pure solvents
hypotonic solution correct answer: if a cell is placed in a salt
concentration in a solution lower than that of the cell
, -->the water will move from the solution into the cell and will
expand
hypertonic solution correct answer: the cell is placed in a
solution of increased salt concentration and the ewater will
move from the inside of the cell to the solution and cell with
shrink
osmotic pressure correct answer: the pressure that must be
applied to stop the movement of solvent through the membrane
chemical kinetics correct answer: a study of how quickly
chemical reactions occur and the factors that affect this speed
reaction rate correct answer: speed of a chemical reaction; a
measure of the change in reactant concentrations over time
--> Rate= (concentration of A @t2 - conc of A @t1) / (t2-t1)
differences in reaction rates that are independent vs dependent
of concentration of reactant correct answer: ** if reaction rate is
independent of concentration = the amount of reactant consumed
and time is LINEAR
** if the reaction rate is dependent of concentration of reactant,
the relationship is curvilinear
rate law equation correct answer: rate = k [A]^x [B]^y
** A & B = the concentrations of the reactants
** x & y = the order of the reaction
