Virginia Tech CHEM 1045 Final Exam
Questions And Correct Answers.
most accurate glassware - Answer volumetric flask
least accurate glassware - Answer beaker
density of a material - Answer mass / volume (g/mL)
where to read a burette - Answer lowest edge of meniscus
equivalency point - Answer moles of acid = moles of base
monoprotic acid - Answer 1 acidic hydrogen
diprotic acid - Answer 2 acidic hydrogen
Molarity - Answer moles / Liters
indicator - Phenolphthalein - Answer acidic form is colorless, basic form is pink
accuracy - Answer the difference between your measured value and its true value
precision - Answer the range of a repeated set of measurements
systematic uncertainty - Answer affects the accuracy of a measurement
random uncertainty - Answer affects the precision of the measurements
ideal gas law - Answer PV = nRT
, What is Boyle's Law used for? - Answer Used for a fixed number of moles at constant
temperature
Boyle's Law - Answer P1 * V1 = P2 * V2 (V is inversely proportional to P)
What is Avogadro's Law used for? - Answer Used for a gas at constant temperature and
pressure
Avogradro's Law - Answer V1 / V2 = n1 / n2 (V is directly proportional to n)
heat of solution (enthalpy) - Answer ΔH
exothermic - Answer -ΔH, gives off heat
endothermic - Answer +ΔH, takes "in" heat
buffer solution - Answer a solution with a known pH value
chemical composition - Answer the chemical composition of the monomer(s) determines the
final chemical composition of the polymer
molecular weight - Answer there is no predefined value for the molecular weight of a polymer.
It depends on the number of monomer units combined during polymerization
topology - Answer refers to the shape of the molecule
includes: linear, branched, cross-linked, star, comb
used to determine the solubility of a polymer
rheology - Answer branch of science that studies the flow and deformation of matter
used to understand molecular weight of a polymer
Questions And Correct Answers.
most accurate glassware - Answer volumetric flask
least accurate glassware - Answer beaker
density of a material - Answer mass / volume (g/mL)
where to read a burette - Answer lowest edge of meniscus
equivalency point - Answer moles of acid = moles of base
monoprotic acid - Answer 1 acidic hydrogen
diprotic acid - Answer 2 acidic hydrogen
Molarity - Answer moles / Liters
indicator - Phenolphthalein - Answer acidic form is colorless, basic form is pink
accuracy - Answer the difference between your measured value and its true value
precision - Answer the range of a repeated set of measurements
systematic uncertainty - Answer affects the accuracy of a measurement
random uncertainty - Answer affects the precision of the measurements
ideal gas law - Answer PV = nRT
, What is Boyle's Law used for? - Answer Used for a fixed number of moles at constant
temperature
Boyle's Law - Answer P1 * V1 = P2 * V2 (V is inversely proportional to P)
What is Avogadro's Law used for? - Answer Used for a gas at constant temperature and
pressure
Avogradro's Law - Answer V1 / V2 = n1 / n2 (V is directly proportional to n)
heat of solution (enthalpy) - Answer ΔH
exothermic - Answer -ΔH, gives off heat
endothermic - Answer +ΔH, takes "in" heat
buffer solution - Answer a solution with a known pH value
chemical composition - Answer the chemical composition of the monomer(s) determines the
final chemical composition of the polymer
molecular weight - Answer there is no predefined value for the molecular weight of a polymer.
It depends on the number of monomer units combined during polymerization
topology - Answer refers to the shape of the molecule
includes: linear, branched, cross-linked, star, comb
used to determine the solubility of a polymer
rheology - Answer branch of science that studies the flow and deformation of matter
used to understand molecular weight of a polymer
