Recent content by hianghao

  1. H

    Henderson Hassalbach equation problem

    So buffer should be acid+conjugate base or base + conjugate acid. Bronsted Acid donate proton while base receive proton. HCl is suppose to be the acid because it has H+ to be donated. If no water product, could it be (CH2OH)3CNH2 + HCl <> (CH2OH)3CCl + NH3? but still it doesn't become TRIS...
  2. H

    Phosphate Buffer Concentration Calculation

    I see...Thanks for the correction :D
  3. H

    Phosphate Buffer Concentration Calculation

    Homework Statement To prepare 1M phosphate buffer pH7.8. pKa=7.21. How much molar of Na2HPO4 and NaH2PO4 to be added I have no confidence in my answer... Can anyone pls have a check?Homework Equations pH=pKa+lg (base/conjugate acid)The Attempt at a Solution 7.8=7.21 +lg (a/b) 0.59=lg (a/b)...
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    Henderson Hassalbach equation problem

    C4H11NO3 + HCl <-> C4H10NO2Cl + H2O? Is this correct? Hence HCl to be added is 0.92M? Because b=salts conc while a=acid/base conc?
  5. H

    Henderson Hassalbach equation problem

    Homework Statement I am trying to prepare a 1L Tris-HCl buffer 1M pH7. The pKa value is 8.06. The question is, how many molar of HCl should be added to produce this buffer? Homework Equations pH = pKa + log [base/acid] The Attempt at a Solution 7=8.06 + lg (a/b) -1.06=lg (a/b)...