chem 101L Questions // Answers 100%
correct // GrAded A+
what do calibration standards define ✔✔ accuracy and quality of measurements
conversions ✔✔ tetra (10^12)
giga (10^9)
mega (10^6)
kilo (10^3)
base
deci (10^-1)
centi (10^-2)
milli (10^-3)
micro (10^-6)
nano (10^-9)
pico (10^-12)
femto (10^-15)
atto (10^-18)
how to find displacement volume (Vd) ✔✔ initial volume reading (Vi) - volume reading with T probe (VT)
how to find corrected volume with buret ✔✔ largest volume increment (Vb) - volume reading with
probe (VT) - displacement value (Vd)
dependent variable is what your are measuring and goes on the _______ axis while independent
variable is what you manipulate and goes on the _______ axis ✔✔ y axis, x axis
temperature and pressure are ________ related ✔✔ directly
in experiment 2, the system was the ✔✔ reactants and products, direct reaction
,the surroundings was the ✔✔ water, cups, everything outside of the cups
in an exothermic reaction ✔✔ the system gives off energy to the surroundings. There is more bond
formation than breaking of bonds. The solution in the calorimeter heats up. The reactants have more
energy than the products.
in an endothermic reaction ✔✔ the system gains heat from the surroundings. There is more bond
breaking than bond forming. The solution in the calorimeter loses heat because it is being supplied to
the reaction. the products have more energy than the reactants.
draw diagram for endothermic ✔✔ diagram
draw diagram for exothermic ✔✔ diagram
how to find the change in temperature DT ✔✔ Tf - Ti
for endothermic reactions, the final temperature will be ✔✔ lower
for exothermic reactions, the final temperature will be ✔✔ higher
Should you add water to acid or acid to water? ✔✔ add acid to water; this minimizes heat that can cause
dangerous fumes or chemical reactions
which is larger quantity, solvent or solute ✔✔ solvent (dissolving medium)
what is solute ✔✔ what is being dissolved in the solvent, smaller quantity
in an aq solution of NaCl, is water the solute or solvent ✔✔ solvent
, draw soluble chart ✔✔ in notebook
spectator ions ✔✔ do not play a direct part in the reaction, can be eliminated
net ionic equations ✔✔ ions directly part of the reaction
what is a precipitate ✔✔ insoluble solid
why do we use two cups in the coffee cup calorimeter setup ✔✔ to limit the escape of heat, making
results more accurate. Styrofoam was used because it's a good insulator of heat
why do you need a stir bar in the calorimeter ✔✔ to thoroughly mix up reactants in order to a chemical
reaction to occur
true or false: to calculate temperature change you do initial temperature minus final ✔✔ false
does making a bond release or requiring energy ✔✔ forming bonds releases energy
why do bond forming reactions release energy ✔✔ represents a stable configuration for atoms
breaking bonds__________ energy ✔✔ requires energy; bonds do not spontaneously break
forming bonds is a characteristic of ✔✔ exothermic reactions
breaking bonds is a characteristic of ✔✔ endothermic reactions
what is the balanced equation for the neutralization of barium hydroxide with sulfuric acid ✔✔ Ba(OH)
(aq) + H2SO4 (aq) ----> Ba(SO4) (s) + 2H2O (l)
correct // GrAded A+
what do calibration standards define ✔✔ accuracy and quality of measurements
conversions ✔✔ tetra (10^12)
giga (10^9)
mega (10^6)
kilo (10^3)
base
deci (10^-1)
centi (10^-2)
milli (10^-3)
micro (10^-6)
nano (10^-9)
pico (10^-12)
femto (10^-15)
atto (10^-18)
how to find displacement volume (Vd) ✔✔ initial volume reading (Vi) - volume reading with T probe (VT)
how to find corrected volume with buret ✔✔ largest volume increment (Vb) - volume reading with
probe (VT) - displacement value (Vd)
dependent variable is what your are measuring and goes on the _______ axis while independent
variable is what you manipulate and goes on the _______ axis ✔✔ y axis, x axis
temperature and pressure are ________ related ✔✔ directly
in experiment 2, the system was the ✔✔ reactants and products, direct reaction
,the surroundings was the ✔✔ water, cups, everything outside of the cups
in an exothermic reaction ✔✔ the system gives off energy to the surroundings. There is more bond
formation than breaking of bonds. The solution in the calorimeter heats up. The reactants have more
energy than the products.
in an endothermic reaction ✔✔ the system gains heat from the surroundings. There is more bond
breaking than bond forming. The solution in the calorimeter loses heat because it is being supplied to
the reaction. the products have more energy than the reactants.
draw diagram for endothermic ✔✔ diagram
draw diagram for exothermic ✔✔ diagram
how to find the change in temperature DT ✔✔ Tf - Ti
for endothermic reactions, the final temperature will be ✔✔ lower
for exothermic reactions, the final temperature will be ✔✔ higher
Should you add water to acid or acid to water? ✔✔ add acid to water; this minimizes heat that can cause
dangerous fumes or chemical reactions
which is larger quantity, solvent or solute ✔✔ solvent (dissolving medium)
what is solute ✔✔ what is being dissolved in the solvent, smaller quantity
in an aq solution of NaCl, is water the solute or solvent ✔✔ solvent
, draw soluble chart ✔✔ in notebook
spectator ions ✔✔ do not play a direct part in the reaction, can be eliminated
net ionic equations ✔✔ ions directly part of the reaction
what is a precipitate ✔✔ insoluble solid
why do we use two cups in the coffee cup calorimeter setup ✔✔ to limit the escape of heat, making
results more accurate. Styrofoam was used because it's a good insulator of heat
why do you need a stir bar in the calorimeter ✔✔ to thoroughly mix up reactants in order to a chemical
reaction to occur
true or false: to calculate temperature change you do initial temperature minus final ✔✔ false
does making a bond release or requiring energy ✔✔ forming bonds releases energy
why do bond forming reactions release energy ✔✔ represents a stable configuration for atoms
breaking bonds__________ energy ✔✔ requires energy; bonds do not spontaneously break
forming bonds is a characteristic of ✔✔ exothermic reactions
breaking bonds is a characteristic of ✔✔ endothermic reactions
what is the balanced equation for the neutralization of barium hydroxide with sulfuric acid ✔✔ Ba(OH)
(aq) + H2SO4 (aq) ----> Ba(SO4) (s) + 2H2O (l)
