Question

This is incorrect. What are the titration points for this titration curve? The pH values, respectively at 0 mL is 9.16, at 10 mL pH is 5.56, at 20 mL pH is 4.98, at the equivalence point the pH is 3.24, at one half equivalence point the pH is 5.23, at 40 mL the pH is 1.87, at 50 mL the pH is 1.60.

Use your calculations to make a sketch of the titration curve.

Label Titration curve : y y Titration curve Points 1 x 0.0 2 x 05 3. * 15.5 4 x 20.0 5. * 315 6 x 380 7. x 49.5 8.95 555 5.25 5.00 480 185 160 y y: x y: , 10 40 45 50 15 20 Volume of H 25 30 35 added (ml.)

Answer 1

The titration point is the equivalent point and those points in which the reaction are not buffering because if there is, the pH takes lot of time changing its value in 0.01 unit. I need a point in which only one proton which exed changes the pH significantly.

I am going to graph using exel2007

x(ml) 9,16 105,56 4,98 40 1,87 1,6 9,16 5.56 pH 4,98 1,87 H 1 10 20 40 50 30 V(ml) 60

The titration points are: y=4.98 x=20.0ml; y=1.87 x=40.0ml and y=5.56 x=10.0ml because the solution are not buffering.