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NEET-XII-Chemistry

02: Solutions

with Solutions - page 4
Qstn# B-40 Prvs-QstnNext-Qstn
  • #40
    Determine
    the amount of CaCl2 (i =
    2.47) dissolved in 2.5 litre of water such that its osmotic pressure
    is 0.75 atm at 27°C.
    Ans : We
    know that,


    Here,
    R
    = 0.0821 L atm K-1mol-1
    M
    = 1 × 40 + 2 × 35.5
    = 111g mol-1
    Therefore, w
    = 3.42 g
    Hence,
    the required amount of CaCl2 is 3.42 g.