Chemical Equilibrium

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1. What is oncotic pressure?

  • 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.
  • 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
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2. 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)

3. 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
  • Kc = [C}^c[D]^d divided by [A]^a[B]^b
  • if K>1 Reactants prevails products (if K is very low reaction may not occur)
  • Kc is dimensionless

4. When th reaction Quotient and rate constant is compared it is used to determine?

  • The direction of the reaction
  • expresses the energy that can be converted during chemical reaction to useful (non pressure volume) work.
  • The spontaneity of a chemical reaction.

5. What does the increasing ionic strenght mean?

  • This increases the activity coefficient and increases the difference between activity and conc (a
  • This decreases the activity coefficient and increases the difference between activity and conc (a
  • This decreases the activity coefficient and decreases the difference between activity and conc (a
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