Chemical Equilibrium

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1. Which of these statements about the tonity of solution is incorrect?

  • Isotonic solution (the solution has the same osmotic pressure compared in the cell)
  • Hypotonic solution (the solution has low osmotic pressure compared to in the cell)
  • There are only 2 different types if tonity
  • Hypertonic solution (the solution has higher osmotic pressure compared in cell)
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2. What is the equation for ionic strenght?

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

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

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

4. 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

5. Which of these statements about equilibrium constant is not true?

  • 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)
  • if K>1 products prevails reactants (if K is very high then it maybe irreversible
  • Kc is dimensionless

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