use ph titration curves for HCL, ethanoic acid and phosphoric acid.. over which reigons is the system behaving as a buffer? Explain
2007-05-04 08:44:18 · 2 answers · asked by Adam 1 in Science & Mathematics ➔ Chemistry
None in HCl, the first horizontal section of ethanoic and the first two horizontal sections of phosphoric.
These are regions where weak acid and conjugate base are both present.
2007-05-04 08:58:40 · answer #1 · answered by Gervald F 7 · 0⤊ 0⤋
HC2H3)2 + NaOH --> NaC2H3O2 + H20 All of the NaOH added will neutralize the acetic acid forming the acetate ion You have the various volumes of base so you can determine how many mols of aceitc acid is left and how many mols of acetate ion you have after each addition HC2H3O2 + H2O = C2H3O2- + H+ Ka = 1.8 x10-5 =[C2H3O2][H+]/[HC2H3O2] [H+] = 1.8 x 10^-5 x [HC2H3)2]/[C2H3O2-] keep in mind the the units for [ ] are mol/l You will need to know both the C2H3O2- concentration and the H2C2O3 concentration after you each addition of NaOH have made
2016-05-20 07:11:08 · answer #2 · answered by ? 3 · 0⤊ 0⤋