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Osmotic Pressure quiz

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  • What is osmotic pressure?
    Osmotic pressure is the force that drives the movement of water across a semipermeable membrane from lower to higher solute concentration.
  • In which direction does water move due to osmotic pressure?
    Water moves from areas of lower solute concentration to areas of higher solute concentration.
  • What is the formula for calculating osmotic pressure?
    The formula is π = iMRT, where π is osmotic pressure, i is the Van't Hoff factor, M is molarity, R is the gas constant, and T is temperature in Kelvin.
  • What does the Van't Hoff factor (i) represent in the osmotic pressure formula?
    The Van't Hoff factor (i) represents the number of particles into which a solute dissociates in solution.
  • What are the units for osmotic pressure (π)?
    Osmotic pressure is measured in atmospheres (atm).
  • What is the value and units of the gas constant (R) used in the osmotic pressure equation?
    The gas constant R is 0.08206 L·atm/mol·K.
  • How does increasing the concentration of a solution affect its osmotic pressure?
    Increasing the concentration increases the osmotic pressure.
  • How does temperature affect osmotic pressure?
    A higher temperature results in a greater osmotic pressure.
  • What does molarity (M) represent in the osmotic pressure equation?
    Molarity (M) is the concentration of solute in moles per liter of solution.
  • Why is temperature expressed in Kelvin in the osmotic pressure formula?
    Temperature is in Kelvin to ensure the correct proportional relationship in the gas law calculations.
  • What role does osmotic pressure play in living cells?
    Osmotic pressure influences the movement of water into and out of cells, affecting cell volume and function.
  • What type of membrane is involved in osmotic pressure?
    A semipermeable membrane, which allows only certain molecules like water to pass through, is involved.
  • How does the Van't Hoff factor (i) affect osmotic pressure?
    A higher Van't Hoff factor increases the osmotic pressure because more particles are present in solution.
  • What happens to osmotic pressure if the temperature is doubled, assuming all other factors are constant?
    If temperature is doubled, osmotic pressure also doubles, as they are directly proportional.
  • In what units should molarity (M) be expressed when using the osmotic pressure formula?
    Molarity should be expressed in moles per liter (mol/L).