Lecture 11/17/14

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Lecture 11/17/14
2014-12-14 22:42:15
BME 221

BME 221
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  1. Explain the salting in effect and what the key point of focus is in the explanation. Maybe helpful to refer to relevant equations (reference equation sheet)
    • When there are more salts dissolved in the solution, the ionic strength increases and the activity coefficients are reduced. Since the thermodynamic Ksp stays constant, the apparent solubility product is higher.
    • The main idea behind the salt effect is the activities of the dissolved ions in the solution.
  2. Name an example of a molecule that would be involved with uncharged solute transport and mention the direction/reason of transport
    • Considering the transport of glucose from a more concentrated region (2) to a less concentrated
    • region (1).
  3. For solute transport of uncharged particles, what the change in free energy for transport of said molecule represent? (equation below)
    This equation will give the maximum amount of non-expansion work when 1 mole of substance is transported. For example, transferring glucose from 1 M to 1 mM region gives us about 11 kJ/mol.
  4. Describe active transport, include an example
    Active transports are often against the concentration gradient. Therefore, the transport must be facilitated by ATP hydrolysis. Sodium-Potassium-ATPase