6. Calculate osmatic pressure=RTc. Which is incorrect?
C= osmolarity
osmatic pressure= 1000RTc (Pa)
c= osmolality
R- gas constant
7. Which of these effects rate constants?
Temperature (reaction rate and rated constant)
Pressure (Only in composition of the system)
Concentration (but it changes reaction rate)
8. What is oncotic pressure?
Colloid osmotic pressure (osmotic pressure of a colloid solution eg. cytosol, blood plasma)
Filtration of solution using external pressure through semipermeable membrane which can retain solute so a pure solution can be obtained
Is the hydrostaic pressure by difference in water potential. It is the osmotic flow of a solvent from high concentration to low concentration though semi permeable membrane.
9. Dispersion systems. Which is Incorrect?
2 types: Homogenous (eg emulsion, suspension foam) and heterogenous (eg. solution, mixtures of gases, alloys)
Systems in which the particles of a dispersed phase are dispersed in a dispersing medium
2 types: Homogenous( eg solution, mixtures of gases, alloys) and heterogenous ( eg.emulsion, suspension foam )
10. what is a colligative property of solutions definitions?
All of the above
It is the properties of the solutions that depend on the number of particles in a given volumn of solvent but not in chemical properties of the solvent
They are observed in diluted solution so its possible to stop interactions with particles which depend on chemical structure.
11. How to calculate the activity of particle (B)?
RTc
I= 0.5 (sum of the conc of ions and (charge of ions)^2)
aB =YB(activity coefficient) x ConcB
1000RTc
12. Equilibrium in live systems. Which is incorrect
None
In biological systems exists a steady (stationary) state, not a chemical equilibrium
It is an open system exchanging energy and matter with surroundings
13. Which of these statements about equilibrium constant is not true?
if K>1 products prevails reactants (if K is very high then it maybe irreversible
if K>1 Reactants prevails products (if K is very low reaction may not occur)
Kc is dimensionless
Kc = [C}^c[D]^d divided by [A]^a[B]^b
14. What is a reverse osmosis?
Colloid osmotic pressure (osmotic pressure of a colloid solution eg. cytosol, blood plasma)
Filtration of solution using external pressure through semipermeable membrane which can retain solute so a pure solution can be obtained
Is the hydrostaic pressure by difference in water potential. It is the osmotic flow of a solvent from high concentration to low concentration though semi permeable membrane.
15. What is the equation for ionic strenght?
I= 0.5 (sum of the conc of ions and (charge of ions)^2)
aB =YB(activity coefficient) x ConcB
RTc
1000RTc
16. Which of these is not example of a colligative property?
Osmosis
increases freezing point
Lowering the solvent vapour pressure
Increases boiling point
17. Which of these statements about the tonity of solution is incorrect?
There are only 2 different types if tonity
Hypotonic solution (the solution has low osmotic pressure compared to in the cell)
Hypertonic solution (the solution has higher osmotic pressure compared in cell)
Isotonic solution (the solution has the same osmotic pressure compared in the cell)
18. If K=1 then
The conc of reactants and products are similar and reaction maybe typically reversible
The conc of reactants and products are similar and reaction maybe typically irreversible
products prevails reactants (if K is very high then it maybe irreversible
Reactants prevails products (if K is very low reaction may not occur)
19. Which of these do not affect equilibrium?
Concentration
Catalyst
Pressure (if moles differ in products and reactants)
