Chem 2510 prelim #2 Test Questions and
All Solved Solutions 2026 Updated.
Lower - Answer A higher boiling point corresponds to a ___ vapor pressure
Water higher than ethanol - Answer Ethanol has a higher vapor pressure than water. Compare
their boiling points
Ethanol higher than water - Answer Water has a higher boiling point than ethanol. Compare
their vapor pressures
PV=nRT - Answer Equation that relates vapor pressure, volume, temperature, and moles
Lower - Answer A lower vapor pressure corresponds to a ___ number of moles in vapor phase
Ethanol - Answer Water has a lower vapor pressure than ethanol. Are there more moles of
water in the vapor phase or ethanol?
Atmospheric pressure - Answer A compounds boiling point is when vapor pressure equals ?
Boiling point - Answer When vapor pressure equals atmospheric pressure is when ___ is
reached
Fischer esterification - Answer The benzodiazepine is synthesized by the ___ mechanism
A process that involves adding a solvent that dissolves impurities but not compound of interest -
Answer What is a trituration?
Benzodiazepine, dissolve and evaporate impurities - Answer In which experiment was a
trituration used and for what purpose?
Molecular weight of desired product/molecular weight of all reactants - Answer What is the
atom economy equation?
Vapor pressure of A=(Vapor pressure of pure A x mole fraction of A in vapor phase) - Answer
What is raoults law of a mixture of two compounds?
, 0 - Answer When the mole fraction of A in vapor phase is 1, the mole fraction of B in vapor
phase is ___
0 - Answer When the mole fraction of B in vapor phase is 1, the mole fraction of A in vapor
phase is ___
None - Answer When mole fraction=1 for A, how much be is in vapor phase
Higher - Answer A lower vapor pressure means a ___ boiling point
More - Answer A higher boiling point requires ___ heat to reach atmospheric pressure from
vapor pressure
More heat required to raise vapor pressure to atmospheric pressure - Answer Why does a
higher BP correspond to lower vapor pressure?
The condenser continuously condenses and boils vapors to sequentially increase the percentage
of compound A in the mixture - Answer How does the fractionating column lead to
purification of a single compound from a mixture?
Boiling point - Answer A distillation separates compounds based on ___
(refractive index index of pure A x mole fraction of A) + (refractive index of pure B + mole
fraction of B) - Answer Refractive index equation involving mole fraction
Refractive index - Answer (refractive index index of pure A x mole fraction of A) + (refractive
index of pure B + mole fraction of B) is the equation for ___
1 - Answer Mole fraction of A + mole fraction of B = ?
A- B vaporizes more easily - Answer Compound A's liquid fraction is higher than its vapor
fraction, does A or B have a higher boiling point?
False - Answer The first fraction collected in a simple distillation can be pure
True - Answer The first fraction collected in a fractional distillation can be pure
Simple - Answer a ___ distillation will fail to purify a mixture completely
All Solved Solutions 2026 Updated.
Lower - Answer A higher boiling point corresponds to a ___ vapor pressure
Water higher than ethanol - Answer Ethanol has a higher vapor pressure than water. Compare
their boiling points
Ethanol higher than water - Answer Water has a higher boiling point than ethanol. Compare
their vapor pressures
PV=nRT - Answer Equation that relates vapor pressure, volume, temperature, and moles
Lower - Answer A lower vapor pressure corresponds to a ___ number of moles in vapor phase
Ethanol - Answer Water has a lower vapor pressure than ethanol. Are there more moles of
water in the vapor phase or ethanol?
Atmospheric pressure - Answer A compounds boiling point is when vapor pressure equals ?
Boiling point - Answer When vapor pressure equals atmospheric pressure is when ___ is
reached
Fischer esterification - Answer The benzodiazepine is synthesized by the ___ mechanism
A process that involves adding a solvent that dissolves impurities but not compound of interest -
Answer What is a trituration?
Benzodiazepine, dissolve and evaporate impurities - Answer In which experiment was a
trituration used and for what purpose?
Molecular weight of desired product/molecular weight of all reactants - Answer What is the
atom economy equation?
Vapor pressure of A=(Vapor pressure of pure A x mole fraction of A in vapor phase) - Answer
What is raoults law of a mixture of two compounds?
, 0 - Answer When the mole fraction of A in vapor phase is 1, the mole fraction of B in vapor
phase is ___
0 - Answer When the mole fraction of B in vapor phase is 1, the mole fraction of A in vapor
phase is ___
None - Answer When mole fraction=1 for A, how much be is in vapor phase
Higher - Answer A lower vapor pressure means a ___ boiling point
More - Answer A higher boiling point requires ___ heat to reach atmospheric pressure from
vapor pressure
More heat required to raise vapor pressure to atmospheric pressure - Answer Why does a
higher BP correspond to lower vapor pressure?
The condenser continuously condenses and boils vapors to sequentially increase the percentage
of compound A in the mixture - Answer How does the fractionating column lead to
purification of a single compound from a mixture?
Boiling point - Answer A distillation separates compounds based on ___
(refractive index index of pure A x mole fraction of A) + (refractive index of pure B + mole
fraction of B) - Answer Refractive index equation involving mole fraction
Refractive index - Answer (refractive index index of pure A x mole fraction of A) + (refractive
index of pure B + mole fraction of B) is the equation for ___
1 - Answer Mole fraction of A + mole fraction of B = ?
A- B vaporizes more easily - Answer Compound A's liquid fraction is higher than its vapor
fraction, does A or B have a higher boiling point?
False - Answer The first fraction collected in a simple distillation can be pure
True - Answer The first fraction collected in a fractional distillation can be pure
Simple - Answer a ___ distillation will fail to purify a mixture completely
