Chem 1 Lab Exam #1 Questions with correct answers
density is an _________ property of matter - ✔✔intensive
% error formula - ✔✔(actual - expected) / expected x 100%
measurements are said to be _______ if they yield very similar results when
repeated in the same manner. - ✔✔precise
a measurement is considered ________ when it yields a result very close to the
true or accepted value. - ✔✔accurate
NaCl solution is - ✔✔non hazardous
magnesium sulfate is - ✔✔non hazardous
manganese sulfate is - ✔✔a health hazard, corrosive, and an environmental
hazard
cupric sulfate is - ✔✔an irritant and an environmental hazard
titrant - ✔✔the substance being added to the analyte. The titrant is usually of
known concentration.
analyte - ✔✔the substance being analyzed. Often of unknown concentration.
, the __ is the point at which the titrant and analyte are present in a stoichiometric
equivalent ratio based on their reaction. - ✔✔equivalence point
end point - ✔✔where the titration ends in reality. If you are using a visual
indicator, this would be where you observe the completion of the rxn.
titration curve - ✔✔this can be a pH v.s. Volume curve, showing change in pH as
titrant is added, for an acid/base rxn. Or it could be a graph of potential v.s.
Volume of titrant added. There are other options as well...
sulfuric acid is - ✔✔corrosive
ammonium cerium (IV) nitrate is - ✔✔oxidizer, health hazard, irritant, and
environmental hazard.
when the atmosphere exerts more pressure than the gas, use - ✔✔Pgas = Patm -
Pfluid
when the gas exerts more pressure than the atmosphere, use - ✔✔Pgas = Patm +
Pfluid
if the fluid is mercury, then - ✔✔the pressure of the fluid is equal to the
difference in height of the fluid level in units of millimeters
the pressure exerted by a fluid due to gravity can be calculated by the equation -
✔✔P = hdg
density is an _________ property of matter - ✔✔intensive
% error formula - ✔✔(actual - expected) / expected x 100%
measurements are said to be _______ if they yield very similar results when
repeated in the same manner. - ✔✔precise
a measurement is considered ________ when it yields a result very close to the
true or accepted value. - ✔✔accurate
NaCl solution is - ✔✔non hazardous
magnesium sulfate is - ✔✔non hazardous
manganese sulfate is - ✔✔a health hazard, corrosive, and an environmental
hazard
cupric sulfate is - ✔✔an irritant and an environmental hazard
titrant - ✔✔the substance being added to the analyte. The titrant is usually of
known concentration.
analyte - ✔✔the substance being analyzed. Often of unknown concentration.
, the __ is the point at which the titrant and analyte are present in a stoichiometric
equivalent ratio based on their reaction. - ✔✔equivalence point
end point - ✔✔where the titration ends in reality. If you are using a visual
indicator, this would be where you observe the completion of the rxn.
titration curve - ✔✔this can be a pH v.s. Volume curve, showing change in pH as
titrant is added, for an acid/base rxn. Or it could be a graph of potential v.s.
Volume of titrant added. There are other options as well...
sulfuric acid is - ✔✔corrosive
ammonium cerium (IV) nitrate is - ✔✔oxidizer, health hazard, irritant, and
environmental hazard.
when the atmosphere exerts more pressure than the gas, use - ✔✔Pgas = Patm -
Pfluid
when the gas exerts more pressure than the atmosphere, use - ✔✔Pgas = Patm +
Pfluid
if the fluid is mercury, then - ✔✔the pressure of the fluid is equal to the
difference in height of the fluid level in units of millimeters
the pressure exerted by a fluid due to gravity can be calculated by the equation -
✔✔P = hdg
