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UNE CHEM 1011 LAB FINAL EXAM-COMPLETE
EXAM SET WITH ACTUAL QUESTIONS AND
VERIFIED SOLUTIONS 2026
Acids - correct-answer -proton donors; have a sour taste and react with bases;
may be corrosive to metals and cause severe burns on contact with skin
bases - correct-answer -proton acceptor; tastes bitter, feels slippery and reacts
with acidds, feels slippery to the skin
pH scale - correct-answer -a convenient way to measure the aciditiy of a solution
acidity - correct-answer -a measure of the amount of dissolved hydronium ions;
the greater number of hydrogen ions in a solution = the more acidic the solution
pH=-log[H+]
Measurements of bases - correct-answer -based on hydroxide ions; the pH value
of a base increases as the amount of hydroxide ions in the solution increases as
there is a decrease in amount of hydrogen ions in a solution
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pH indicator - correct-answer -changes color at a specific pH and allows you to
measure the pH of a substance; each indiciator changes color within a well-
defined pH ranges
** this allows for us to se the moment when the analyte has completely reacted
with the titrant
acid ionization constant (Ka) - correct-answer -the equilibrium constant for a
reaction in which an acid donates a proton to water to form a hydronium ion and
a conjugate base
**the larger the value of Ka = the stronger the acid
base ionization constant - correct-answer -the equilibrium constant for the
reaction of a weak base with water, which forms a hydroxide ion and conjugate
acid
Strong Acid vs weak acid - correct-answer -strong acid=completely ionizes in
water, forming a conjugate base that is weaker than water
weak acid=only partially ionizes in water forming a stronger base than water
equivalence point - correct-answer -the point at which the two solutions used in a
titration are present in chemically equivalent amounts
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=when exactly enough base (titrant) has been added to completely react with the
acid (analyte)
=identified by a dramatic increase in pH
half equivalence point - correct-answer -the mement when the exact volume of
strong base has been titrated into the weak acid, to convert half the weak acid
into its conjugate base;
conc of weak acid = conc of conjug base
- pKa = pH
titration - correct-answer -a measured amount of a solution of unknown
concentration is added to a known volume of a second solution until the reaction
between them is just complete
Phenolpthalein - correct-answer -ph indicator taht turns bright pink at a basic pH
of 8.2 and higher
stoichiometric equivalence point - correct-answer -the point at which chemically
equivalent quantites of the acid and abse are rpesent; this is determine by using
an indiciator which changes color in the presence of acids/bases based on pH of a
solution
UNE CHEM 1011 LAB FINAL EXAM-COMPLETE
EXAM SET WITH ACTUAL QUESTIONS AND
VERIFIED SOLUTIONS 2026
Acids - correct-answer -proton donors; have a sour taste and react with bases;
may be corrosive to metals and cause severe burns on contact with skin
bases - correct-answer -proton acceptor; tastes bitter, feels slippery and reacts
with acidds, feels slippery to the skin
pH scale - correct-answer -a convenient way to measure the aciditiy of a solution
acidity - correct-answer -a measure of the amount of dissolved hydronium ions;
the greater number of hydrogen ions in a solution = the more acidic the solution
pH=-log[H+]
Measurements of bases - correct-answer -based on hydroxide ions; the pH value
of a base increases as the amount of hydroxide ions in the solution increases as
there is a decrease in amount of hydrogen ions in a solution
,2|Page
pH indicator - correct-answer -changes color at a specific pH and allows you to
measure the pH of a substance; each indiciator changes color within a well-
defined pH ranges
** this allows for us to se the moment when the analyte has completely reacted
with the titrant
acid ionization constant (Ka) - correct-answer -the equilibrium constant for a
reaction in which an acid donates a proton to water to form a hydronium ion and
a conjugate base
**the larger the value of Ka = the stronger the acid
base ionization constant - correct-answer -the equilibrium constant for the
reaction of a weak base with water, which forms a hydroxide ion and conjugate
acid
Strong Acid vs weak acid - correct-answer -strong acid=completely ionizes in
water, forming a conjugate base that is weaker than water
weak acid=only partially ionizes in water forming a stronger base than water
equivalence point - correct-answer -the point at which the two solutions used in a
titration are present in chemically equivalent amounts
, 3|Page
=when exactly enough base (titrant) has been added to completely react with the
acid (analyte)
=identified by a dramatic increase in pH
half equivalence point - correct-answer -the mement when the exact volume of
strong base has been titrated into the weak acid, to convert half the weak acid
into its conjugate base;
conc of weak acid = conc of conjug base
- pKa = pH
titration - correct-answer -a measured amount of a solution of unknown
concentration is added to a known volume of a second solution until the reaction
between them is just complete
Phenolpthalein - correct-answer -ph indicator taht turns bright pink at a basic pH
of 8.2 and higher
stoichiometric equivalence point - correct-answer -the point at which chemically
equivalent quantites of the acid and abse are rpesent; this is determine by using
an indiciator which changes color in the presence of acids/bases based on pH of a
solution
