Chemical Equilibrium

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1. 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 )
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2. Which of these is not example of a colligative property?

  • Osmosis
  • Increases boiling point
  • increases freezing point
  • Lowering the solvent vapour pressure

3. How to calculate the activity of particle (B)?

  • aB =YB(activity coefficient) x ConcB
  • I= 0.5 (sum of the conc of ions and (charge of ions)^2)
  • 1000RTc
  • RTc

4. What does the increasing ionic strenght mean?

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

5. 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

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