Fick's Law and Diffusion
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Questions and Answers

What is the effect of a smaller particle size on the rate of diffusion?

  • It has no effect on the rate of diffusion
  • It requires more energy
  • It moves faster than a larger particle (correct)
  • It moves slower than a larger particle

    • What is the effect of increasing the temperature on the rate of diffusion?

  • It increases the rate of diffusion (correct)
  • It is proportional to the size of the particle
  • It decreases the rate of diffusion
  • It has no effect on the rate of diffusion

    • What is the driving force behind Fick's Law?

  • Size of the particles
  • Concentration gradient (correct)
  • Surface area of the membrane
  • Temperature of the system

    • How does an increase in surface area affect the rate of diffusion?

    <p>It increases the rate of diffusion</p> Signup and view all the answers

    What is the effect of a longer diffusion distance on the rate of diffusion?

    <p>It decreases the rate of diffusion</p> Signup and view all the answers

    What is the effect of a steeper concentration gradient on the rate of diffusion?

    <p>It increases the rate of diffusion</p> Signup and view all the answers

    How does an increase in the diffusion coefficient (D) affect the rate of diffusion?

    <p>It increases the rate of diffusion</p> Signup and view all the answers

    What is the effect of a thinner barrier on the rate of diffusion?

    <p>It increases the rate of diffusion</p> Signup and view all the answers

    What is the direction of solute molecules diffusion through the semi-permeable membrane?

    <p>From high concentration to low concentration</p> Signup and view all the answers

    What is the meaning of the lag time in the context of diffusion?

    <p>The time required for a solute to establish a uniform concentration gradient within the membrane</p> Signup and view all the answers

    What is the relation between the concentration gradient and the flux of the solute?

    <p>The concentration gradient is directly proportional to the flux of the solute</p> Signup and view all the answers

    How does the surface area of the membrane affect the diffusion of the solute?

    <p>It increases the diffusion of the solute</p> Signup and view all the answers

    What is the effect of increasing the diffusion distance on the diffusion of the solute?

    <p>It decreases the diffusion of the solute</p> Signup and view all the answers

    What is the unit of the flux of the solute?

    <p>M/L/t</p> Signup and view all the answers

    What is the role of the diffusion coefficient in Fick's first law of diffusion?

    <p>It is a measure of the ease of diffusion of the solute</p> Signup and view all the answers

    Which factor increases the rate of particle diffusion?

    <p>Higher surface area</p> Signup and view all the answers

    What occurs when the concentration difference (C1 - C2) is larger?

    <p>The rate of diffusion increases</p> Signup and view all the answers

    How does temperature affect the rate of diffusion?

    <p>Higher temperature increases the rate of diffusion</p> Signup and view all the answers

    What is the impact of diffusion distance (h) on the diffusion rate?

    <p>It decreases the diffusion rate</p> Signup and view all the answers

    Which process involves the solvent passing through a semipermeable membrane?

    <p>Osmosis</p> Signup and view all the answers

    What will happen if a drug container does not prevent the absorption of water vapor?

    <p>The shelf life will significantly reduce</p> Signup and view all the answers

    What is one of the first steps in drug release?

    <p>Diffusion of solvent</p> Signup and view all the answers

    Which phenomenon is crucial for the dissolution and release of drugs from dosage forms?

    <p>Diffusion</p> Signup and view all the answers

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