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Posted by on Wednesday, November 28, 2012 at 10:29am.

what is the pH of a 0.10 M solution of methylamine (CH3NH2, kb= 4.4*10^-4) at 25 degree C?

  • chemistry - , Wednesday, November 28, 2012 at 7:10pm

    Let's call CH3NH2 simply BNH2.
    ...........BNH2 + HOH ==> BNH3^+ + OH^-
    I..........0.10............0........0
    C............-x............x........x
    E.........-0.10-x...........x........x

    Substitute the E line in the Kb expression and solve for OH^-, then convert this to pH.

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