Chemical Equilibrium

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1. Which of these effects rate constants?

  • Concentration (but it changes reaction rate)
  • Temperature (reaction rate and rated constant)
  • Pressure (Only in composition of the system)
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2. How to calculate the activity of particle (B)?

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

3. 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 )

4. Which of these is not example of a colligative property?

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

5. 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.


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