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Thread: PH/Volume question

  1. #1
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    PH/Volume question

    Pure Hydrogen chloride is a gas.
    What volume of HCL (g) (measured at 25 degrees C and 100kPa) would have to be dissolved in 2.00 L of water to produce a solution with pH of 1.25?

  2. #2
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    Re: PH/Volume question

    pH = -log(H+)

    H+ = 10^-pH = 10^-1.25 = 0.056234 mol/L

    n(HCl) = 0.056234 mol/L* 2 L = 0.11247 mol

    V(HCl (g)) = n(HCl)*MV = 0.11247 mol*24.79 L/mol = 2.788L = 2.79 L (3s.f.)

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