COLLIGATIVE PROPERTIES Flashcards
solid solute (a particular non volatile solute) dissolved in a volatile solvent
COLLIGATIVE PROPERTY
PORPERTIES OF MOLECULES IN A SOLUTION
- depend on the total contribution of atoms in the molecules or on the sum of the properties of the constituents in a solution
- mass, molar refraction
ex: molar mass (tinototal kasi siya)
ADDITIVE PROPERTIES
PROPERTIES
- depend on the arrangement and to a lesser extent on the kind of atoms within a molecule
- optical rotation, refractive index
CONSTITUTIVE PROPERTIES
PROPERTIES
- depend mainly on the number of particles in a solution
- the property of a particular solution will change depending on the amount of solute present in the solution
COLLIGATIVE PROPERTY
- physical property of a solution that depends mainly on the particles that are present in a solution
- physical property that varies according to the concentration of the dissolved solute
COLLIGATIVE PROPERTIES
4 COLLIGATIVE PROPERTIES
mga nagbabago sa property ng solution kapag nalagyan ng solute
- Vapor pressure lowering
- Boiling point elevation
- Freezing point depression
- Osmotic pressure exists
Veggie kulang sa supply, Burger sa taas, Fries na malungkot, may Order ma-pressure ka!
ALWAYS REMEMBER !!!!
kapag naglagay ka ng SOLUTE sa solvent, magbabago na ang colligative property nito
nakaapekto na ang solute sa solvent, at naging solution na siya
OK SALAMAT
values of colligative properties are the same for different solutes as the same molar concentration
mostly organic substances
same ang value kahit iba iba ang solute basta same ang molar conc.
NON-ELECTROLYTES
values of colligative properties depend on the number of ions
considers the **i factor **
STRONG ELECTROLYTES
ionic compounds
strong acids, strong bases
values of colligative properties depend on ionization
ionization is partial
WEAK ELECTROLYTES
weak acids, weak bases
COLLIGATIVE PROPERTY
the solute should be
NONVOLATILE
COLLIGATIVE PROPERTY
the solvent is usually
WATER
COLLIGATIVE PROPERTY
the solutions should be in what concentration
DILUTE
WATER IS PURE, DOES NOT CONTAIN SOLUTE
VAPOR PRESSURE
23.8 mmHg
WATER IS PURE, DOES NOT CONTAIN SOLUTE
BOILING POINT
100 C
WATER IS PURE, DOES NOT CONTAIN SOLUTE
FREEZING POINT
0 C
WATER IS PURE, DOES NOT CONTAIN SOLUTE
OSMOTIC PRESSURE
DOES NOT EXIST
when a ____ is added or is dissolved in water and creates a solution, the properties of water are changed when a solution is formed
NONVOLATILE SOLUTE
what is the effect in the vapor pressure of water which is 23.8 mmHg when a nonvolatile solute is added
VAPOR PRESSURE LOWERING
the vapor pressure of a solution is ____ than the pure solvent
LESS
the escaping tendency of the solvent is explained by
RAOULT’S LAW
the vapor pressure of a solution containing a nonvolatile solute is lowered porportional to the relative number
RAOULT’S LAW
formula for change in vapor pressure ∆P
∆P = P₁º x 0.018 x m
m - molal conc.
P₁º - pressure
formula for new vapor pressure
given yung change in pressure ∆P
Psoln = P₀ - ∆P
what is the effect in the boiling point of water (100C) when a nonvolatile solute is added
ELEVATION OF BOILING POINT
a solution (nonvolatile solute + volatile solvent) will boil at a ____ temperature than will the pure solvent
HIGHER
change in boiling point
∆Tb
formula for change in boiling point for NON-ELECTROLYTES
∆Tb = Kbm
Kb = molal elevation constant / ebullioscopic constant
m = molal conc.
Kb
molal elevation constant / ebullioscopic constant
other term for molal elevation constant
EBULLIOSCOPIC CONSTANT
Kb unit
deg Kg / mole
MOLAL ELEVATION CONSTANT / EBULLIOSCOPIC CONSTANT
WATER
0.515
MOLAL ELEVATION CONSTANT / EBULLIOSCOPIC CONSTANT
ACETIC ACID
2.930
formula for change in boiling point for ELECTROLYTES
∆Tb = i x Kbm
formula for new boiling point
given yung change in boiling point ∆Tb
Tbsoln = ∆T₀ + ∆Tb
ELECTROLYTE OR NON
metal + non metal
ELECTROLYTE
ELECTROLYTE OR NON
acids (H + metal), bases (metal + OH)
ELECTROLYTE
ELECTROLYTE OR NON
non metal + non metal
NON ELECTROLYTES
what is the effect in the freezing point of water which is 0C when a nonvolatile solute is added
DEPRESSION OF FREEZING POINT
adding salt to pure water causes it to freeze at a temperature ____ 0C
BELOW
adding ____ to pure water causes it to freeze at a temperature below 0C
SALT
Hinders the water molecules from forming ice crystals
SALT
Kf
MOLAL DEPRESSION CONSTANT / CRYOSCOPIC CONSTANT
molal depression constant is also called as
CRYOSCOPIC CONSTANT
MOLAL DEPRESSION CONSTANT / CRYOSCOPIC CONSTANT
Kf
UNIT:
MOLAL DEPRESSION CONSTANT / CRYOSCOPIC CONSTANT
Kf
deg Kg / mole
Kf value for water
1.86
formula for change in freezing point for NON-ELECTROLYTES
∆Tf = Kfm
formula for change in freezing point for ELECTROLYTES
∆Tf = i x Tfm
formula for new freezing point
given yung change in freezng point ∆Tf
Tf = ∆T₀ - ∆Tf
the diffusion of the solvent through a semi-permeable membrane that allows only the solvent to pass through it
OSMOSIS
the pressure that results from osmosis
OSMOTIC PRESSURE
the pressure greater than that is above the pure solvent that must be applied to the solution to prevent the passage of the solvent through the semi-permeable membrane
OSMOTIC PRESSURE
formulas used for osmotic pressure
VAN’T HOFF
MORSE
VAN’T HOFF EQUATION
π = nRT / V
MORSE EQUATION
π = RTm
osmosis always takes place in the direction that will ____ the concentration of all components on both sides of the membrane
EQUALIZE
when an osmotic pressure is equal on both sides of the membrane, the system is
dami ng tubig na dumadaan in & out
ISOOSMOTIC
OSMOTIC
in biological fluids (inside our body), the equilibration is termed
galaw ng solute
ISOTONIC
- A solution has the same solute concentration as another solution.
- There is no net movement of water particles, and the overall concentration on both sides of the cell membrane remains constant
ISOTONIC SOLUTION
- A solution that has a higher solute concentration than another solution
- Water particles will move out of the cell, causing crenation (shrink)
HYPERTONIC SOLUTION
- A solution that has a lower solute concentration than another solution
- Water particles will move into cell, causing the cell to expand and eventually pop
HYPOTONIC
hyPOtok
biological fluids has a salt concentration of
0.9%
freezing point of biological fluids
blood serum & lacrimal fluid
-0.52C
FREEZING POINT
ISOTONIC
= 0.52C
FREEZING POINT
HYPERTONIC
< -0.52C
FREEZING POINT
HYPOTONIC
-0.52C - 0C