CHEM 210 EXAM 1 EXAM WITH
CORRECT QUESTIONS AND ANSWERS
2025
systematic error - CORRECT-ANSWERSError that shifts all
measurements in a standardized way. Decreases accuracy. Can
result in bias, can be discovered and corrected
Examples of systematic errors - CORRECT-ANSWERSInaccurate
calibration of equipment, inaccuracies in meter, variation
in systematic performance with temperature.
random error - CORRECT-ANSWERSError that is due to chance
and is not standardized. Decreases precision.
Precision - CORRECT-ANSWERSa measure of how close a series
of measurements are to one another
Accuracy - CORRECT-ANSWERSA description of how close a
measurement is to the true value of the quantity measured.
Acid - CORRECT-ANSWERSA substance that increases the
hydrogen ion concentration of a solution., proton donor
base - CORRECT-ANSWERSproton acceptor
salt - CORRECT-ANSWERSionic solid
conjugate acid-base pair - CORRECT-ANSWERSconsists of two
substances related to each other by the donating and
accepting of a single hydrogen ion
, Constant for water, Kw - CORRECT-ANSWERS= [H+][OH-] =
1.0*10^-14
If solution is acidic, ph= - CORRECT-ANSWERSph is below 7,
[H+]>[OH-]
If solution is basic, pH= - CORRECT-ANSWERSph is above 7,
[H+]<[OH-]
strong acids and bases - CORRECT-ANSWERScompletely
dissociate in aqueous solutions
Common strong acids - CORRECT-ANSWERSHCl, HBr, HI, H₂SO₄,
HNO₃, HClO₄
common strong bases - CORRECT-ANSWERSLiOH, NaOH, KOH, RbOH,
CsOH, Ca(OH)2, Sr(OH)2, Ba(OH)2
Weak acids - CORRECT-ANSWERSpartially dissociate in water
acid dissociation constant - CORRECT-ANSWERSKa =
[H+][A-]/[HA]
HA = H+ + A-
Weak bases - CORRECT-ANSWERSreact with water to form the
hydroxide ion and the conjugate acid of the base
base hydrolysis constant - CORRECT-ANSWERSKb =
[BH+][OH-]/[B]
B + H20 = BH+ + OH-
CORRECT QUESTIONS AND ANSWERS
2025
systematic error - CORRECT-ANSWERSError that shifts all
measurements in a standardized way. Decreases accuracy. Can
result in bias, can be discovered and corrected
Examples of systematic errors - CORRECT-ANSWERSInaccurate
calibration of equipment, inaccuracies in meter, variation
in systematic performance with temperature.
random error - CORRECT-ANSWERSError that is due to chance
and is not standardized. Decreases precision.
Precision - CORRECT-ANSWERSa measure of how close a series
of measurements are to one another
Accuracy - CORRECT-ANSWERSA description of how close a
measurement is to the true value of the quantity measured.
Acid - CORRECT-ANSWERSA substance that increases the
hydrogen ion concentration of a solution., proton donor
base - CORRECT-ANSWERSproton acceptor
salt - CORRECT-ANSWERSionic solid
conjugate acid-base pair - CORRECT-ANSWERSconsists of two
substances related to each other by the donating and
accepting of a single hydrogen ion
, Constant for water, Kw - CORRECT-ANSWERS= [H+][OH-] =
1.0*10^-14
If solution is acidic, ph= - CORRECT-ANSWERSph is below 7,
[H+]>[OH-]
If solution is basic, pH= - CORRECT-ANSWERSph is above 7,
[H+]<[OH-]
strong acids and bases - CORRECT-ANSWERScompletely
dissociate in aqueous solutions
Common strong acids - CORRECT-ANSWERSHCl, HBr, HI, H₂SO₄,
HNO₃, HClO₄
common strong bases - CORRECT-ANSWERSLiOH, NaOH, KOH, RbOH,
CsOH, Ca(OH)2, Sr(OH)2, Ba(OH)2
Weak acids - CORRECT-ANSWERSpartially dissociate in water
acid dissociation constant - CORRECT-ANSWERSKa =
[H+][A-]/[HA]
HA = H+ + A-
Weak bases - CORRECT-ANSWERSreact with water to form the
hydroxide ion and the conjugate acid of the base
base hydrolysis constant - CORRECT-ANSWERSKb =
[BH+][OH-]/[B]
B + H20 = BH+ + OH-
