CHEM 1128. ACS Final Exam Practice 2 LATEST
VERSION-2023 WITH 100% CORRECT
RATIONALE. VERIFIED&GRADED A+
Polarizability - ANSWER the ease with which the e- distribution in a molecule or
atom is distorted (Larger molecules have higher value)
Solute + Solvent = Solution - ANSWER Solute (smaller), Solvent (larger amount),
Solution (homogeneous mixture)
Solvation - ANSWER solvent molecules are surrounded by solvent molecules
Polar solute - ANSWER soluble in polar solvent
Non-Polar solute - ANSWER soluble in non-polar solvent
Solubility - ANSWER amount of solute needed to form a saturated solution
Saturated Solution - ANSWER solution that is in equilibrium with undissolved solute
(the maximum amount of solute that can be dissolved in a given amount of solvent at
a given temperature)
Unsaturated Solution - ANSWER solution that has less than the maximum amount
of solute
Super Saturated Solution - ANSWER solution that has more than maximum amount
of solute is dissolved in a given solvent at a given temperature
Crystallization - ANSWER used to purify things
Effect of Pressure (Solute-solvent Interactions) - ANSWER P does not effect the
solubility of solid and liquid in liquid solvent
P effects the solubility of a gas in a liquid solvent
↑ in P = ↑ solubility of a gas in liquid
Henry's Law - ANSWER the solubility of the gas increases in direct proportion to its
partial pressure above the solution
Cg=KPg - ANSWER C - (Solubility, M)
K - Henry's Constant
Pg - Partial Pressure of gas over solution
Effects of Temperature (Solute-solvent Interactions) - ANSWER ↑ T, solubility of a
solid in a liquid solvent ↑
, ↑ T, solubility of a gas in a liquid solvent ↓
Molarity (M) - ANSWER M = moles/solution volume,L
M1V1=M2V2 -- Concentrated Soln. = Dilute Soln.
Mole Fraction - ANSWER Xa = na/ntotal
Xb = nb/ntotal
Xa+Xb=1
Mass Percent - ANSWER (mass of solute/total mass of solute)x100
PPM: " "x10E6
PPB:" "x10E9
Molality (m) - ANSWER m = moles solute/mass solvent (kg)
Colligative Properties of Solution - ANSWER properties of solution that depend on
the concentration of the solute and no on the kind of solute particles
Lowering of Vapor Pressure (CPoS) - ANSWER (VP) solution has lower VP than a
pure solvent
Higer value of 1 = lower VP
Raoult's Law - ANSWER P1 = X1P1°
P1 - VP of solution
X1 - mole fraction
P1° - VP of solvent
ΔP = X2P1°
ΔP - VP lowering
X2 - mole fraction of solute
Elevation in Boiling Point (CPoS) - ANSWER (BP) solution has a higher BP than a
pure solvent
Higher molar mass = higher BP
Elevation in BP Equations - ANSWER ΔTb = Tb - Tb°
Elevation in BP=BP Soln - BP Solv.
ΔTb = ikbm
ΔTb - Elevation in BP
i - Van't Hoff Factor
kb - Molal BP Constant
m - molality
Depression in Freezing Point (CPoS) - ANSWER (FP) solution has a lower BP than
a pure solvent
Depression in FP Equations - ANSWER ΔTf = Tf° - Tf
Depression in FP = FP Solv - FP Soln
VERSION-2023 WITH 100% CORRECT
RATIONALE. VERIFIED&GRADED A+
Polarizability - ANSWER the ease with which the e- distribution in a molecule or
atom is distorted (Larger molecules have higher value)
Solute + Solvent = Solution - ANSWER Solute (smaller), Solvent (larger amount),
Solution (homogeneous mixture)
Solvation - ANSWER solvent molecules are surrounded by solvent molecules
Polar solute - ANSWER soluble in polar solvent
Non-Polar solute - ANSWER soluble in non-polar solvent
Solubility - ANSWER amount of solute needed to form a saturated solution
Saturated Solution - ANSWER solution that is in equilibrium with undissolved solute
(the maximum amount of solute that can be dissolved in a given amount of solvent at
a given temperature)
Unsaturated Solution - ANSWER solution that has less than the maximum amount
of solute
Super Saturated Solution - ANSWER solution that has more than maximum amount
of solute is dissolved in a given solvent at a given temperature
Crystallization - ANSWER used to purify things
Effect of Pressure (Solute-solvent Interactions) - ANSWER P does not effect the
solubility of solid and liquid in liquid solvent
P effects the solubility of a gas in a liquid solvent
↑ in P = ↑ solubility of a gas in liquid
Henry's Law - ANSWER the solubility of the gas increases in direct proportion to its
partial pressure above the solution
Cg=KPg - ANSWER C - (Solubility, M)
K - Henry's Constant
Pg - Partial Pressure of gas over solution
Effects of Temperature (Solute-solvent Interactions) - ANSWER ↑ T, solubility of a
solid in a liquid solvent ↑
, ↑ T, solubility of a gas in a liquid solvent ↓
Molarity (M) - ANSWER M = moles/solution volume,L
M1V1=M2V2 -- Concentrated Soln. = Dilute Soln.
Mole Fraction - ANSWER Xa = na/ntotal
Xb = nb/ntotal
Xa+Xb=1
Mass Percent - ANSWER (mass of solute/total mass of solute)x100
PPM: " "x10E6
PPB:" "x10E9
Molality (m) - ANSWER m = moles solute/mass solvent (kg)
Colligative Properties of Solution - ANSWER properties of solution that depend on
the concentration of the solute and no on the kind of solute particles
Lowering of Vapor Pressure (CPoS) - ANSWER (VP) solution has lower VP than a
pure solvent
Higer value of 1 = lower VP
Raoult's Law - ANSWER P1 = X1P1°
P1 - VP of solution
X1 - mole fraction
P1° - VP of solvent
ΔP = X2P1°
ΔP - VP lowering
X2 - mole fraction of solute
Elevation in Boiling Point (CPoS) - ANSWER (BP) solution has a higher BP than a
pure solvent
Higher molar mass = higher BP
Elevation in BP Equations - ANSWER ΔTb = Tb - Tb°
Elevation in BP=BP Soln - BP Solv.
ΔTb = ikbm
ΔTb - Elevation in BP
i - Van't Hoff Factor
kb - Molal BP Constant
m - molality
Depression in Freezing Point (CPoS) - ANSWER (FP) solution has a lower BP than
a pure solvent
Depression in FP Equations - ANSWER ΔTf = Tf° - Tf
Depression in FP = FP Solv - FP Soln
