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NEET-XII-Chemistry

02: Solutions

with Solutions - page 4
Qstn# B-41 Prvs-Qstn
  • #41
    Determine
    the osmotic pressure of a solution prepared by dissolving 25 mg of
    K2SO4 in 2 liter of water at 25° C, assuming that it is completely
    dissociated.
    Ans : When K2SO4 is dissolved in water, ions are produced.

    Total number of ions
    produced = 3
    i =3
    Given,
    w = 25 mg =
    0.025 g
    V = 2 L
    T = 250C
    = (25 + 273) K = 298 K
    Also, we know that:
    R = 0.0821 L atm
    K-1mol-1
    M = (2 ×
    39) + (1 × 32) + (4 × 16) = 174 g mol-1
    Appling the following
    relation,