Cards (17)

  • 1 cm3 = 1 ml
  • 1 dm3 = 1000cm3 = 1000ml = 1 liter
  • mol = conc x vol (dm3)
  • A standard solution is a solution of known concentration. Standard solutions are prepared by dissolving an exact mass of the solute in a solvent and making up the solution to an exact volume
  • At the same temp and pressure, equal volumes of different gases contain the same number of molecules
  • The molar gas volume VmV_m is the volume per mole of gas molecules at a stated temp and pressure
  • At RTP (room temp and pressure), 1 mole of gas molecules has a volume of approx. 24.0 dm3
    Therefore, at RTP, the molar gas volume = 24.0 dm3mol-1
  • mol = vol/molar gas vol
  • At RTP
    mol = vol dm3/24
  • Assumptions for the molecules making up an ideal gas:
    • random motion
    • elastic collisions
    • negligible size
    • no intermolecular forces
  • Ideal gas equation:
    pV = nRT
  • The ideal gas constant is R = 8.314 Jmol-1K-1
  • pV = nRT
    Pressure = Pa
    Volume = m3
    Amount of gas molecules = mol
    Ideal gas constant = 8.31 Jmol-1K-1
    Temperature = K
  • cm3 to m3 = x10^-6
  • dm3 to m3 = x10^-3
  • degrees C to K = +273
  • KPa to Pa = x1000